Martingale collar for show lead. Here you need to choose B (neck size) and A (skull size). The collar is braided in 4 strands. If you want only 1 color you only choose color 1. If you want 2 colors, you choose color 1 and color 2. If you want 3 colors, you choose color 1, color 2 and color 3. Color 1 will be dominant. If you need 4 colours, send me a message. Made to order.