IMPORTANT NOTICE: This product has 9mm snaps and would fit most bodysuits with 9 - 9.5 mm snap buttons. . Most popular baby brands use 9mm snaps but some also use 8mm. Please measure the size of buttons on your little one's bodysuit first. These extenders are made of high quality and very soft 100% cotton flannel. They are approximately 10 X 8 cm (4x3 inches) with 9 mm snaps which are 16-20 mm apart. The snaps are positioned on the outer trim to support extra strength and durability. They fit most chain baby clothes including: Carters, Nirvana,Nickelodeon, Pink Floyd, Granimals, Kohl's Jumping Beans, duck.duck.goose, Puma, Cutie Pie Lovable Friends, Baby Kiss, Baby essential and First Impression. They also fit MOST Baby gear, Disney and Hello Kitty onsies. These Baby bodysuit extenders are designed and manufactured by a UK mum.