According to Mempool Research, the block size has increased steadily since the Bitcoin Taproot upgrade, but there is still more room for growth. The widespread adoption of inscriptions could bring the Bitcoin network's average block size to 4 trillion bytes (MB) per block, far higher than the current average, according to a report published Feb. 4 by Mempool Research. The report says the average block size (the amount of data contained in each block published to the network's public ledger) for Bitcoin is currently just over 1.5 MB. Mempool Research says that if inscriptions - a method of effectively encoding arbitrary data within a block - are adopted more widely, Bitcoin's block size could increase significantly.