This Crochet Hook Gauge from Katrinkles is a useful took that makes a great gift for a crocheter, and is a handy addition to your crochet project bag. Its precise holes are laser cut from bamboo—perfect for measuring crochet hooks from sizes B through P. The center of this gauge is adorned with a hand-drawn representation of a crocheted granny square. Both the US letter size and metric measurement are clearly etched above and below each hole to ensure it is universal for every crocheter. Each piece is hand-sanded after laser cutting to smooth out corners and edges. Bamboo plywood is sustainable and is stronger than wood. Your needle gauge won't be indestructible but can withstand more than a needle gauge made of birch. This hook gauge measures approximately 3" x 3" x 1/8". Because it is made of a natural material, the appearance of each gauge may slightly vary.(Please note that crochet hooks with ergonomic handles are often made with larger hook heads than the metric measurement of the shaft and will not work with this gauge).