Each layer has 8 trays, measuring 3 1/8" long, 2 1/2" wide, and 5/8" deep. You can get just about any color you'd like, just send a private message if you want to see the current selection of filaments in a certain color. Depending on the size you order, there could be a couple days before it is done. It may take even more time depending on where you are placed in the order list.