> ## Documentation Index
> Fetch the complete documentation index at: https://staging.docs.aile.tech/llms.txt
> Use this file to discover all available pages before exploring further.

# Trade sizes and limits

> The largest firm quote available right now in each direction, per pair, and the limits that apply.



\<table><thead><tr><th>Pair</th>
              
                  \<th>You buy the coin
largest firm quote now</th>
                  \<th>You sell the coin
largest firm quote now</th></tr></thead>
          \<tbody /></table>

## How sizes work- **The largest firm quote now** is `maxFirmSize` on `GET /levels` (per direction) and on `GET /quote` (at the
  rate you were just quoted), in USDC and in the coin. A request above it answers `400 over-size` with the
  maximum in the detail; below the minimum, `400 amount-too-small` with the minimum.
- A quote at or below the size shown fills at exactly the quoted amounts or reverts: no slippage, no partial
  fill.
- The size is bounded by the maker's wallet balance for the coin it pays, its allowance to the order
  protocol, the largest trade its book allows and the quotes it is holding for other takers. It moves as fills
  happen and as makers rebalance.
- A dash with a reason means the direction is not quoted at this moment: *maker funding* (the maker's
  balance or allowance cannot cover a trade), *no midmarket rate*, *paused*.## Need more?For a size that must always be available, or a pair not listed, write to
[hello@aile.tech](mailto:hello@aile.tech) with the corridor, the expected daily volume, ticket sizes and the
hours that matter to you. See [Liquidity and capacity](https://staging.docs.aile.tech/reference/liquidity-and-capacity.md).


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.