Which dimensions apply to which level of grip?
One pack can equip two boots, with 12 studs per pack (6 studs per boot).
For the 11-13 mm (12 studs): good grip
4 x 11mm studs for the front, and 2 x 13mm studs for the rear of the boot.
For the 13-15mm pack (12 studs): Very good grip
4 x 13mm studs for the front, and 2 x 15mm studs for the rear of the boot.
Perfect for defenders and goalkeepers.