This plastic-free tape measure from Cocoknits measures both inches and cm/mm (78" / 2 m long), and has a metal tab on the end to keep it from retracting into the body of the tape measure.

Because Cocoknits is committed to avoiding plastic wherever possible, they manufactured it from PLA, a 100% biodegradable plant fiber (similar to the Needle Gauge, but not water soluble). The absence of a locking mechanism keeps them 100% plastic-free and reduces the likelihood of breakage. 

• Made of PLA: 100% fiber waste called polylactic acid, which is made from fermented plant starch such as corn, beets, or sugar cane. It is 100% biodegradable and contains no plastic (this product can get wet; it is NOT water soluble)
• Packaged individually in a linen drawstring bag with Cocoknits logo
• The tape measure does not have a locking mechanism, so hold the metal tab or the tape at the body to keep it extended.
• Dimensions: Casing: 2.5 x 2 x .5" (6.5 x 5 x 1.27 cm) & metal tape: 78" / 2 m long