These tiles are 20mm in diameter and 6mm thick - a bit thicker than the standard 4mm for glass tiles.  You can buy them either as full sheets of 224 tiles (measuring 28 x 30cm) or as part sheets of 49 tiles. Some of these are supplied on paper and must be soaked off, but most are on a mesh backing which is easily peeled off.

If you're trying to match a colour, you may find it useful to know codes/names under which this tile has previously been sold by Mosaic Workshop and other retailers:

R02

Use the search button at the top right of the home page to look for any numbers/names you're trying to match.

Please note that in order to save on postage costs I will often cut a sheet of tiles in half so that it fits in a smaller parcel. If it’s important to you to receive your sheets whole, please let me know. NB that this only really applies to small orders. If you order more than four or five sheets, they will almost always arrive whole.