We currently allow our users to upload the main image up to 10 MB.
The other files have a maximum file size of 16 MB (pdf, ogg, mp4, mp3).
We support PNG, gif, jpeg, pdf, ogg, mp3, mp4.
We recommend our users to use a 1:1 RATIO for their images. The reason for that is that squares work best on all ERC-721 wallets. Ultimately, the point of a NFT is that is is interoperable and can be displayed on different dapps and wallets.