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