Welcome to the store. Note: The 60 size and 70 size of the swimming ring are not the actual diameter of the swimming ring, but a size mark of the swimming ring. The actual size of the swimming ring will be introduced below 60 size fits around 2-4 years old 70 size fits around 5-9 years old 80 size suitable for teenagers 90 size suitable for adults [60 size] Measurement before inflation; outer diameter 55cm, inner diameter 18cm [70 size] Measurement before inflation; outer diameter 65cm, inner diameter 21cm [80 size] Measurement before inflation; outer diameter 75cm, inner diameter 25cm [90 size] Measurement before inflation; outer diameter 85cm, inner diameter 28cm Name: Hibiscus swimming pool Size: the size before inflation; outer diameter 85cm, inner diameter 28cm Packing: OPP bag Weight: 270g Material: PVC PVC thickness: 0.25 (mm) Pattern: flower Package Included: 1 * swimming ring If you need any help,contact the seller.