YSTD&reg; 8pcs 2.5-6mm Plastic Handle Crochet Aluminum Knit Hook Needle Knitting DIY Set Ideal for all crochet projects Size: 13.5cm/5.3" ( L ) The ergonomic shape grip that developed independently by Tulip is very comfortable to hold This hook set employs durable aluminum that's polished for extra smoothness Hook Size: 2.5mm/0.10inch3.0mm/0.12inch3.5mm/0.14inch,4.0mm/0.16inch, 4.5mm/0.18inch5.0mm/0.20inch5.5mm/0.22inch6.0mm/0.24inch