Handmade. The elastic is 2cm wide, so it feels a little less constricting. Size: Elastic width: 2cm Elastic length: 18 It's generally loose-fitting. There's an opening on the back to adjust the elastic. One design features pink elastic inside a transparent fabric, and the other is patchwork-style. I made this with care, but it's a hobby project made by an amateur, so I don't think it's perfect. I have a cat. Please refrain from purchasing if you are concerned or have allergies. Thank you for your understanding. I hope you will consider this after understanding the above. Thank you.