Our hat size reducer tape rolls are made of comfortable polyethlene foam with a strong self adhesive backing which keeps the strip permanently attached to the hat under the sweatband; easy to install and suitable for all types of hats and caps | Each roll is 19mm (3/4") wide, 60cm (24") long and 3mm (1/8") thick | One roll is enough to reduce the size of a hat by 2cm; although we recommend choosing a good fitting hat to begin with and using our hat reducer form making smaller adjustments (maximum 1cm (3/8")) for achieving a perfect fit. | Usage instructions: Cut the strip into small pieces and place them inside the sweatband to find the right place and amount of padding; to permanently attach the strips stick them to the crown of the hat inside the sweatband | Satisfaction Guarantee; our hat reducer foam tape roll is backed by our manufacturer 30 day money back guarantee