Durable Waterproof Roller Skating Backpack for Inline Speed Slalom Slide Roller Skates – Available in Small and Large Sizes, in Black, Blue, and Rose

You can choose size S / L,

size S: can support 4X100mm/3x110mm speed wheel maximum, the cover length is 42cm ;
size L: can support 4X110mm /3x125mm speed wheel maximum, the cover length is 45cm;
You can choose all black / blue / rose colors;