Ethereum blob limit bumps up to 21, boosting network scalability

Ethereum developers have raised the blob limit for a second time in recent weeks, a move that will allow more transactions to be batched via rollups, making them cheaper.

Ethereum scalability was boosted on Wednesday with the second Blob Parameter-Only hard fork, raising the blob limit from 15 to 21, the first of many improvements aimed at scaling the Ethereum ecosystem in 2026.

The second BPO hard fork, which took 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 raised the blob target from 10 to 14, which is widely seen as the more important metric to watch, as consistently approaching the 21-blob limit could overload node bandwidth and storage.

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