TLDR
Ethereum (ETH) blob capacity rose in 2025 and is expected to rise further in earlymid 2026 during the next planned upgrades, with additional adjustments through 20262028 per developer outlines in recent updates (network progress summary).
- 2025 upgrades increased blob throughput and activated PeerDAS to safely support higher blob counts (technical recap).
- Earlymid 2026 upgrades (Glamsterdam, followed by Hegota) aim to raise capacity and decentralize block building (upgrade timing note).
- Developers outlined 20262028 changes that move more execution into blobs and safely increase limits (developer roadmap summary).
Deep Dive
1. 2025 Increases
Blob capacity effectively rose in 2025 via two changes highlighted by multiple reports. Pectra increased blob throughput, and Fusaka activated PeerDAS (data availability sampling), which allows higher blob counts without overloading nodes (upgrade recap). Developers also noted blob count increased among the years milestones (year-end summary).
Blob capacity is the L1 data allowance for rollups. Higher capacity lowers data costs and enables more throughput for L2s.
2. EarlyMid 2026 Schedule
Recent coverage indicates the next major upgrade window in earlymid 2026 (Glamsterdam), followed by another (Hegota) later in 2026 (timing note). Developer outlines also mention near-term mechanisms like BAL and enshrined PBS to facilitate capacity and gas-limit increases, with further blob-centric execution changes rolling out between 2026 and 2028 (developer roadmap summary).
Expect incremental capacity rises rather than a single switch, with protocol tools enabling safe tuning and decentralization.
3. Impact on Fees and Throughput
Higher capacity has coincided with rising throughput and muted fees. Recent data points to record L1 transactions alongside very low average fees, suggesting scalability improvements are translating into practical cost reductions (network activity highlight).
More blobs and complementary changes help rollups publish data cheaper and more often, improving user costs and supporting broader L2 adoption.
Conclusion
Blob capacity rises are an ongoing process that began in 2025 and continue with earlymid 2026 upgrades and further adjustments through 20262028. The practical effect is lower data costs and higher throughput for rollups, supporting Ethereums rollup-centric scaling path. Confidence: moderate, because specifics come from developer commentary summarized in media; exact dates and parameter changes are finalized in core dev meetings. Checking the next upgrade notices will give the most precise timing.
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