Ah thank you!! That Will helpThey are 10mm (3/8"). They did swell up quite a bit from soaking so maybe thats why they look so big? I've been using them to refill Bean and Papaya's Tweety Pie toys. I think my lil conures could definitely chew them but they have no interest in beads. Its my Blue Crown and Sun Conure who do and they can snap beads up to a 1" in size, the 3/8" ones are their favorite size for sure.