diff --git a/crates/subspace-runtime-primitives/Cargo.toml b/crates/subspace-runtime-primitives/Cargo.toml
index e4ec1c7c1b..6af925ceb5 100644
--- a/crates/subspace-runtime-primitives/Cargo.toml
+++ b/crates/subspace-runtime-primitives/Cargo.toml
@@ -18,7 +18,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.6.5", default-features = false, features = ["derive"] }
 frame-support = { default-features = false, git = "https://github.com/subspace/polkadot-sdk", rev = "6da3c45e1d5b3c1f09b5e54152b8848149f9d5e6" }
-frame-system = { default-features = false, optional = true, git = "https://github.com/subspace/polkadot-sdk", rev = "6da3c45e1d5b3c1f09b5e54152b8848149f9d5e6" }
+frame-system = { default-features = false, git = "https://github.com/subspace/polkadot-sdk", rev = "6da3c45e1d5b3c1f09b5e54152b8848149f9d5e6" }
 pallet-transaction-payment = { default-features = false, git = "https://github.com/subspace/polkadot-sdk", rev = "6da3c45e1d5b3c1f09b5e54152b8848149f9d5e6" }
 scale-info = { version = "2.11.1", default-features = false, features = ["derive"] }
 sp-core = { default-features = false, git = "https://github.com/subspace/polkadot-sdk", rev = "6da3c45e1d5b3c1f09b5e54152b8848149f9d5e6" }
@@ -31,6 +31,7 @@ default = ["std"]
 std = [
     "codec/std",
     "frame-support/std",
+    "frame-system/std",
     "pallet-transaction-payment/std",
     "scale-info/std",
     "sp-core/std",
@@ -38,6 +39,5 @@ std = [
     "subspace-core-primitives/std",
 ]
 testing = [
-    "frame-system",
     "sp-io"
 ]
diff --git a/crates/subspace-runtime-primitives/src/lib.rs b/crates/subspace-runtime-primitives/src/lib.rs
index a62fc99f6f..07c3bb3f72 100644
--- a/crates/subspace-runtime-primitives/src/lib.rs
+++ b/crates/subspace-runtime-primitives/src/lib.rs
@@ -27,6 +27,7 @@ use codec::{Codec, Decode, Encode};
 use frame_support::pallet_prelude::Weight;
 use frame_support::traits::tokens;
 use frame_support::weights::constants::WEIGHT_REF_TIME_PER_SECOND;
+use frame_system::limits::BlockLength;
 use pallet_transaction_payment::{Multiplier, TargetedFeeAdjustment};
 use scale_info::TypeInfo;
 use sp_core::parameter_types;
@@ -53,6 +54,14 @@ pub const SLOT_PROBABILITY: (u64, u64) = (1, 6);
 pub const BLOCK_WEIGHT_FOR_2_SEC: Weight =
     Weight::from_parts(WEIGHT_REF_TIME_PER_SECOND.saturating_mul(2), u64::MAX);
 
+/// Maximum block length for non-`Normal` extrinsic is 5 MiB.
+pub const MAX_BLOCK_LENGTH: u32 = 5 * 1024 * 1024;
+
+/// We allow for 3.75 MiB for `Normal` extrinsic with 5 MiB maximum block length.
+pub fn maximum_normal_block_length() -> BlockLength {
+    BlockLength::max_with_normal_ratio(MAX_BLOCK_LENGTH, NORMAL_DISPATCH_RATIO)
+}
+
 /// Alias to 512-bit hash when used in the context of a transaction signature on the chain.
 pub type Signature = MultiSignature;
 
diff --git a/crates/subspace-runtime/src/lib.rs b/crates/subspace-runtime/src/lib.rs
index ef56343b2c..4de14c1731 100644
--- a/crates/subspace-runtime/src/lib.rs
+++ b/crates/subspace-runtime/src/lib.rs
@@ -98,9 +98,9 @@ use subspace_core_primitives::{
     SegmentCommitment, SegmentHeader, SegmentIndex, SlotNumber, SolutionRange, U256,
 };
 use subspace_runtime_primitives::{
-    AccountId, Balance, BlockNumber, FindBlockRewardAddress, Hash, Moment, Nonce, Signature,
-    SlowAdjustingFeeUpdate, BLOCK_WEIGHT_FOR_2_SEC, MIN_REPLICATION_FACTOR, NORMAL_DISPATCH_RATIO,
-    SHANNON, SLOT_PROBABILITY, SSC,
+    maximum_normal_block_length, AccountId, Balance, BlockNumber, FindBlockRewardAddress, Hash,
+    Moment, Nonce, Signature, SlowAdjustingFeeUpdate, BLOCK_WEIGHT_FOR_2_SEC, MAX_BLOCK_LENGTH,
+    MIN_REPLICATION_FACTOR, NORMAL_DISPATCH_RATIO, SHANNON, SLOT_PROBABILITY, SSC,
 };
 
 sp_runtime::impl_opaque_keys! {
@@ -196,16 +196,13 @@ const RECENT_HISTORY_FRACTION: (HistorySize, HistorySize) = (
 const MIN_SECTOR_LIFETIME: HistorySize =
     HistorySize::new(NonZeroU64::new(4).expect("Not zero; qed"));
 
-/// Maximum block length for non-`Normal` extrinsic is 5 MiB.
-const MAX_BLOCK_LENGTH: u32 = 5 * 1024 * 1024;
-
 parameter_types! {
     pub const Version: RuntimeVersion = VERSION;
     pub const BlockHashCount: BlockNumber = 250;
     /// We allow for 2 seconds of compute with a 6 second average block time.
     pub SubspaceBlockWeights: BlockWeights = BlockWeights::with_sensible_defaults(BLOCK_WEIGHT_FOR_2_SEC, NORMAL_DISPATCH_RATIO);
     /// We allow for 3.75 MiB for `Normal` extrinsic with 5 MiB maximum block length.
-    pub SubspaceBlockLength: BlockLength = BlockLength::max_with_normal_ratio(MAX_BLOCK_LENGTH, NORMAL_DISPATCH_RATIO);
+    pub SubspaceBlockLength: BlockLength = maximum_normal_block_length();
 }
 
 pub type SS58Prefix = ConstU16<2254>;
diff --git a/domains/primitives/runtime/src/lib.rs b/domains/primitives/runtime/src/lib.rs
index a3ba5f7eea..02cb53e935 100644
--- a/domains/primitives/runtime/src/lib.rs
+++ b/domains/primitives/runtime/src/lib.rs
@@ -25,7 +25,7 @@ use alloc::string::String;
 #[cfg(not(feature = "std"))]
 use alloc::vec::Vec;
 pub use fp_account::AccountId20;
-use frame_support::dispatch::{DispatchClass, PerDispatchClass};
+use frame_support::dispatch::DispatchClass;
 use frame_support::weights::constants::{BlockExecutionWeight, ExtrinsicBaseWeight};
 use frame_system::limits::{BlockLength, BlockWeights};
 use parity_scale_codec::{Decode, Encode};
@@ -35,10 +35,9 @@ use sp_runtime::generic::UncheckedExtrinsic;
 use sp_runtime::traits::{Convert, IdentifyAccount, Verify};
 use sp_runtime::transaction_validity::TransactionValidityError;
 use sp_runtime::{MultiAddress, MultiSignature, Perbill};
+use sp_weights::constants::WEIGHT_REF_TIME_PER_SECOND;
 use sp_weights::Weight;
-use subspace_runtime_primitives::{
-    BLOCK_WEIGHT_FOR_2_SEC, NORMAL_DISPATCH_RATIO, SHANNON, SLOT_PROBABILITY,
-};
+use subspace_runtime_primitives::{MAX_BLOCK_LENGTH, SHANNON, SLOT_PROBABILITY};
 
 /// Alias to 512-bit hash when used in the context of a transaction signature on the chain.
 pub type Signature = MultiSignature;
@@ -68,32 +67,29 @@ pub const SLOT_DURATION: u64 = 1000;
 /// The EVM chain Id type
 pub type EVMChainId = u64;
 
-/// The maximum domain block weight.
+/// Dispatch ratio for domains
+pub const NORMAL_DISPATCH_RATIO: Perbill = Perbill::from_percent(65);
+
+/// The maximum domain block weight with 3.25 MiB as proof size
+/// Consensus allows 3.75 MiB but Fraud proof can carry extra size along with proof size
+/// So we set the proof size to 3.25 MiB
 pub fn maximum_domain_block_weight() -> Weight {
-    NORMAL_DISPATCH_RATIO * BLOCK_WEIGHT_FOR_2_SEC
+    let consensus_maximum_normal_block_length =
+        *maximum_block_length().max.get(DispatchClass::Normal) as u64;
+    let weight =
+        NORMAL_DISPATCH_RATIO * Weight::from_parts(WEIGHT_REF_TIME_PER_SECOND.saturating_mul(2), 0);
+    weight.set_proof_size(consensus_maximum_normal_block_length)
 }
 
-/// Maximum block length for mandatory dispatch.
-pub const MAXIMUM_MANDATORY_BLOCK_LENGTH: u32 = 5 * 1024 * 1024;
-
-/// Maximum block length for operational and normal dispatches.
-pub const MAXIMUM_OPERATIONAL_AND_NORMAL_BLOCK_LENGTH: u32 = u32::MAX;
-
 /// Custom error when nonce overflow occurs.
 pub const ERR_NONCE_OVERFLOW: u8 = 100;
 /// Custom error when balance overflow occurs.
 pub const ERR_BALANCE_OVERFLOW: u8 = 200;
 
 /// Maximum block length for all dispatches.
+/// This is set to 3.75 MiB since consensus chain supports on 3.75 MiB for normal
 pub fn maximum_block_length() -> BlockLength {
-    BlockLength {
-        max: PerDispatchClass::new(|class| match class {
-            DispatchClass::Normal | DispatchClass::Operational => {
-                MAXIMUM_OPERATIONAL_AND_NORMAL_BLOCK_LENGTH
-            }
-            DispatchClass::Mandatory => MAXIMUM_MANDATORY_BLOCK_LENGTH,
-        }),
-    }
+    BlockLength::max_with_normal_ratio(MAX_BLOCK_LENGTH, NORMAL_DISPATCH_RATIO)
 }
 
 /// The existential deposit. Same with the one on primary chain.
@@ -103,9 +99,6 @@ pub const EXISTENTIAL_DEPOSIT: Balance = 500 * SHANNON;
 /// used to limit the maximal weight of a single extrinsic.
 const AVERAGE_ON_INITIALIZE_RATIO: Perbill = Perbill::from_percent(5);
 
-/// Maximum total block weight.
-pub const MAXIMUM_BLOCK_WEIGHT: Weight = Weight::from_parts(u64::MAX, u64::MAX);
-
 /// Calculates the max bundle weight
 // See https://forum.subspace.network/t/on-bundle-weight-limits-sum/2277 for more details
 // about the formula
@@ -125,13 +118,20 @@ pub fn calculate_max_bundle_weight(
                 .checked_mul(consensus_slot_probability.0)?,
         )?;
 
+    // set the proof size for bundle to be proof size of max domain weight
+    // so that each domain extrinsic can use the full proof size if required
+    let max_proof_size = max_domain_block_weight.proof_size();
     let max_bundle_weight = max_domain_block_weight.checked_div(expected_bundles_per_block)?;
-    Some((expected_bundles_per_block, max_bundle_weight))
+    Some((
+        expected_bundles_per_block,
+        max_bundle_weight.set_proof_size(max_proof_size),
+    ))
 }
 
 /// Calculates the maximum extrinsic weight for domains.
 /// We take bundle slot probability to be always at the maximum i.e 1 such that
 /// operator can produce bundle in each slot
+/// we also set the maximum extrinsic POV to be 3.75 MiB which is what Consensus allows
 fn maximum_domain_extrinsic_weight() -> Option<Weight> {
     let (_, max_bundle_weight) =
         calculate_max_bundle_weight(maximum_domain_block_weight(), SLOT_PROBABILITY, (1, 1))?;
@@ -139,26 +139,19 @@ fn maximum_domain_extrinsic_weight() -> Option<Weight> {
 }
 
 pub fn block_weights() -> BlockWeights {
+    // allow u64::MAX for ref_time and proof size for total domain weight
+    let maximum_block_weight = Weight::from_parts(u64::MAX, u64::MAX);
     let max_extrinsic_weight =
         maximum_domain_extrinsic_weight().expect("Maximum extrinsic weight must always be valid");
     BlockWeights::builder()
         .base_block(BlockExecutionWeight::get())
         .for_class(DispatchClass::all(), |weights| {
             weights.base_extrinsic = ExtrinsicBaseWeight::get();
-        })
-        .for_class(DispatchClass::Normal, |weights| {
             // maximum weight of each transaction would be the maximum weight of
             // single bundle
             weights.max_extrinsic = Some(max_extrinsic_weight);
             // explicitly set max_total weight for normal dispatches to maximum
-            weights.max_total = Some(MAXIMUM_BLOCK_WEIGHT);
-        })
-        .for_class(DispatchClass::Operational, |weights| {
-            // maximum weight of each transaction would be the maximum weight of
-            // single bundle
-            weights.max_extrinsic = Some(max_extrinsic_weight);
-            // explicitly set max_total weight for operational dispatches to maximum
-            weights.max_total = Some(MAXIMUM_BLOCK_WEIGHT);
+            weights.max_total = Some(maximum_block_weight);
         })
         .avg_block_initialization(AVERAGE_ON_INITIALIZE_RATIO)
         .build_or_panic()
diff --git a/domains/runtime/auto-id/src/lib.rs b/domains/runtime/auto-id/src/lib.rs
index 21f30ac013..e9c4454817 100644
--- a/domains/runtime/auto-id/src/lib.rs
+++ b/domains/runtime/auto-id/src/lib.rs
@@ -16,7 +16,7 @@ use codec::{Decode, Encode, MaxEncodedLen};
 use domain_runtime_primitives::opaque::Header;
 pub use domain_runtime_primitives::{
     block_weights, maximum_block_length, opaque, Balance, BlockNumber, Hash, Nonce,
-    EXISTENTIAL_DEPOSIT, MAXIMUM_BLOCK_WEIGHT,
+    EXISTENTIAL_DEPOSIT,
 };
 use domain_runtime_primitives::{
     AccountId, Address, CheckExtrinsicsValidityError, DecodeExtrinsicError, Signature,
diff --git a/domains/runtime/evm/src/lib.rs b/domains/runtime/evm/src/lib.rs
index a5c83be475..663a0504d8 100644
--- a/domains/runtime/evm/src/lib.rs
+++ b/domains/runtime/evm/src/lib.rs
@@ -17,8 +17,8 @@ use alloc::format;
 use codec::{Decode, Encode, MaxEncodedLen};
 use domain_runtime_primitives::opaque::Header;
 pub use domain_runtime_primitives::{
-    block_weights, maximum_block_length, opaque, Balance, BlockNumber, Hash, Nonce,
-    EXISTENTIAL_DEPOSIT, MAXIMUM_BLOCK_WEIGHT,
+    block_weights, maximum_block_length, maximum_domain_block_weight, opaque, Balance, BlockNumber,
+    Hash, Nonce, EXISTENTIAL_DEPOSIT,
 };
 use domain_runtime_primitives::{
     CheckExtrinsicsValidityError, DecodeExtrinsicError, ERR_BALANCE_OVERFLOW, ERR_NONCE_OVERFLOW,
@@ -589,7 +589,7 @@ pub const WEIGHT_PER_GAS: u64 = WEIGHT_REF_TIME_PER_SECOND.saturating_div(GAS_PE
 parameter_types! {
     /// EVM block gas limit is set to maximum to allow all the transaction stored on Consensus chain.
     pub BlockGasLimit: U256 = U256::from(
-        MAXIMUM_BLOCK_WEIGHT.ref_time() / WEIGHT_PER_GAS
+        maximum_domain_block_weight().ref_time() / WEIGHT_PER_GAS
     );
     pub PrecompilesValue: Precompiles = Precompiles::default();
     pub WeightPerGas: Weight = Weight::from_parts(WEIGHT_PER_GAS, 0);
diff --git a/domains/test/runtime/evm/src/lib.rs b/domains/test/runtime/evm/src/lib.rs
index 3ad492455a..58bb39df82 100644
--- a/domains/test/runtime/evm/src/lib.rs
+++ b/domains/test/runtime/evm/src/lib.rs
@@ -17,8 +17,8 @@ use alloc::format;
 use codec::{Decode, Encode, MaxEncodedLen};
 pub use domain_runtime_primitives::opaque::Header;
 use domain_runtime_primitives::{
-    block_weights, maximum_block_length, ERR_BALANCE_OVERFLOW, ERR_NONCE_OVERFLOW,
-    EXISTENTIAL_DEPOSIT, MAXIMUM_BLOCK_WEIGHT, SLOT_DURATION,
+    block_weights, maximum_block_length, maximum_domain_block_weight, ERR_BALANCE_OVERFLOW,
+    ERR_NONCE_OVERFLOW, EXISTENTIAL_DEPOSIT, SLOT_DURATION,
 };
 pub use domain_runtime_primitives::{
     opaque, Balance, BlockNumber, CheckExtrinsicsValidityError, DecodeExtrinsicError, Hash, Nonce,
@@ -571,7 +571,7 @@ pub const WEIGHT_PER_GAS: u64 = WEIGHT_REF_TIME_PER_SECOND.saturating_div(GAS_PE
 parameter_types! {
     /// EVM block gas limit is set to maximum to allow all the transaction stored on Consensus chain.
     pub BlockGasLimit: U256 = U256::from(
-        MAXIMUM_BLOCK_WEIGHT.ref_time() / WEIGHT_PER_GAS
+        maximum_domain_block_weight().ref_time() / WEIGHT_PER_GAS
     );
     pub PrecompilesValue: Precompiles = Precompiles::default();
     pub WeightPerGas: Weight = Weight::from_parts(WEIGHT_PER_GAS, 0);