Determine the size you need, simply measure across the top diameter. All bands are 1 1/8" wide (rim) 200 pcs 1/2" - 3/4" Diameter - SB012, 3/4" - 1" Diameter - SB100, 1" - 1 1/4" Diameter - SB124, 1 1/4 - 1 1/2 Diameter - SB142, 1 1/2" - 1 3/4" Diameter - SB143, 1 3/4" - 2" Diameter - SB200, 2" - 2 1/2 Diameter - SB220, 2 1/2" - 2 3/4" Diameter - SB240, 2 3/4" - 3" Diameter - SB300, 3" - 3 1/4" Diameter - SB312, 3 1/4" - 3 1/2" Diameter - SB314 3 1/2" - 3 3/4" Diameter - SB344