Ethereum developers have raised the blob limit for the second time in recent weeks, a move that enables more transactions to be pooled via rollups, making them cheaper.
Ethereum's scalability was boosted on Wednesday with the second pure blob parameter hard fork, raising the blob limit from 15 to 21, the primary of many improvements geared toward scaling the Ethereum ecosystem in 2026.
The second BPO hard fork, which went into effect on Wednesday at 1:01:11 UTC, further increases Ethereum's data throughput by allowing more transactions to be batched via rollups.
The BPO hard fork also increased the blob goal from 10 to 14, which is widely seen because the more essential metric to look at as a continuing approach to the 21 blob limit could overwhelm node bandwidth and storage.
One blob unit holds 128 kilobytes of information, meaning Ethereum can now store as much as 2,688 KB in a single block.
Source: Terence Chan
Blobs help keep the Ethereum mainnet stable
While blobs increase transaction throughput on Ethereum's second layer, additionally they help stabilize gas fees on the Ethereum mainnet because the network is less congested.
Data from YCharts shows that Ethereum transaction fees have been way more stable for the reason that first BPO hard fork on December 9, 2025.
Change in Ethereum fees during the last 12 months. Source: YCharts
Gas limit increase also on the radar
Participants on the Ethereum All Core Developers meeting on December 15 also discussed the thought of increasing the network gas limit from 60 million to 80 million once the second BPO hard fork is implemented.
This would directly increase the variety of transactions and smart contract operations that fit into each Ethereum block – further increasing overall throughput while potentially reducing fees.
Scalability can also be the main target of the Glamsterdam hard fork
Later in 2026, the Glamsterdam hard fork will allow the gas limit to be increased as much as 200 million and introduce “perfect parallel processing.”
Perfect parallel processing is made possible on Ethereum through block access lists as a part of Ethereum Improvement Proposal-7928, which goals to remodel Ethereum's single-lane mode of transaction processing right into a multi-lane highway, further increasing transaction throughput.
