One set of INTERCONNECTING RINGS is enticing and easy for baby to grasp. They’re crocheted mostly in acrylic yarn, some in cotton yarn. All are washable. If you have a colour preference, please let me know, or we can select for you. Rings are handmade and therefore may vary slightly in size but are approximately 8.5cm (3″) in diameter and about 1cm (3/8″) thick.