> For the complete documentation index, see [llms.txt](https://www.size.club/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.size.club/docs/compare.md).

# Compare Size

Understand how Size differs from paper trading, perpetual trading, prop-firm challenges, and Moon.

Size turns trading decisions into games. Your balance during a game is virtual; free practice and paid prize games have different rewards and entry conditions.

Choose the comparison closest to what you already use:

| If you are considering…            | Read                                                                          |
| ---------------------------------- | ----------------------------------------------------------------------------- |
| A simulator for practising trades  | [Size vs paper trading](https://www.size.club/docs/compare/paper-trading)     |
| Holding leveraged market positions | [Size vs perpetual trading](https://www.size.club/docs/compare/perp-trading)  |
| A retail funded-account challenge  | [Size vs prop-firm challenges](https://www.size.club/docs/compare/prop-firms) |
| Leveraged market wagers on Moon    | [Size vs Moon](https://www.size.club/docs/compare/moon)                       |

These comparisons explain different experiences, rather than a universal best choice. Product features and offers change. Check the linked rules and terms before entering a paid game or using another service.

[Start with a free Size game](https://www.size.club/docs/start/first-game).


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