The whole tray is about 16cm x 10cm and the molds are quite very shallow but the pattern was just too good not to get - I love Art Deco so it was a must have! After 3 days of curing I did a drop test of the pieces off a table onto concrete and none of them broke (these were the ones not sealed also).
Could be used with epoxy resin however I did make these out of Ecrylimer and then have dunked some in gloss glaze to give them some more strength. I would recommend leaving them for an hour before demolding if doing them in eco resin.