All needle gauges have millimeter and half sizes, unless otherwise noted.
Chiaogoo Needle Gauge is a good choice if you are looking for a ulta-lightweight option. Manufactured in the USA this 5″ (12 cm) needle gauges is made of durable plastic.
Knitter's Pride Needle View Sizer has a magnifier to help with see your stitches when trying to determine gauge. It measures 6" by 2 1/4".
Knitter's Pride Round View Sizer is about 2 1/2" in diameter. Made of durable plastic.
Susan Bates' Knit Chek does not have options for sizing US 1 1/2 (2.5mm) and US 2 1/2 (3mm) needle sizes, and does not note mm sizing. Made of metal, this needle gauge is indestructible and has been around for so long that it is almost iconic. It measures 5" by 3".
All tape measures are spring-type and measure up to 60". Push a button and it retracts!
The Sock Ruler is constructed of a heavy duty, yet flexible plastic; an innovative measuring tool for sock knitters that goes inside of the sock, allowing it to lie flat and ensure accurate measurements. Made in the USA. To see how the ruler works, click here.