della Q Crochet Roll for Crochet Hooks (Sizes A to N); 050 Black 166-2-050 Fifteen lettered/numbered pockets, one non-lettered/unnumbered Holds hook sizes US A, B, C, D, E F, G, H, I, J, K, L, M, N (no US equivalent for 3.75) Measures (closed) 7" H; (open) 17 W x 7 H; Pocket depth of 4" Made from Taffeta Silk and Poly Silk della Q offers a Lifetime Guarantee from any manufacturer's defects