# Why do the heaviest sats carry so many inscriptions?

A sat's Book A weight includes every inscription, reinscription and transfer bought in its name.

URL: https://blockspace.wiki/answers/why-do-the-heaviest-sats-carry-so-many-inscriptions/

A sat's weight is [Book A](https://blockspace.wiki/glossary/book-a/): every byte of every transaction bought in its name, including its inscriptions, its [reinscriptions](https://blockspace.wiki/glossary/reinscription/) and the transfers that moved them. A sat inscribed many times adds them all up. On 2026-10-21 the heaviest, sat 1,858,630,000,000,000, held 29 inscriptions and 9.59 MB, while a single large inscription reached 3.99 MB.

Sources:

- block.space docs: rankings · https://block.space/docs/rankings
- block.space: the 100,000 heaviest sats, with the inscriptions, BRC-20, bitmap, sat-name and CAT-21 sub-items · https://block.space/heaviest-sats
- block.space heaviest sats API · https://block.space/api/heaviest-sats

Updated: 2026-10-21