These hooks are beautifully colored translucent plastic crochet hooks. Each fun color is a size so you can find the size you need at a glance. The famous in line head helps reduce wrist motion for fatigue free crocheting and helps you maintain a more consistent gauge. Details: 7" x 3.5" x 0.25" cases size Set includes assorted sizes Vinyl case is perfect to store your hooks safely Plastic Contents: US size G-6 (4 mm) US size H-8 (5 mm) US size I0 (5.5 mm) US size J-10 (6 mm) US size K-10.5 (6.5 mm)