This unique silicone mold has 2 different cavity sizes to meet all of your embedding needs. 2 troughs: 1"(L) x 1/8"(W) x 1/8"(D). 14 cavities: 1/4"(L) x 1/2"(W) x 1/8"(D). 1 trough: 2 3/4"(L) x 3/32"(W) x 1/8"(D). 10 cavities: 3/8"(L) x 3/4"(W) x 1/8"(D). Each cavity has an alpha-numeric marking, A1-A7, B1-B7, C1-C5, D1-D5.