Set of 100 assorted coloured cotton reels (20 of each colour). Overall length 31mm, maximum diameter 32mm. Reels can be threaded with string and used to help learn counting and numeracy. Set of 100 assorted coloured cotton reels (20 of each colour). These reels are great for working on sorting by colour, matching identical items and sequencing activities. They can also be used to work on counting and numeracy skills.