„What is the external diameter of the baby swimming ring?”
The external diameter of the baby swimming ring is 54 cm.
„The red hoop is supposedly only suitable for children up to 1 year old as they do not have the strength knock it over. There are obviously also yellow or orange colours rings for older children. In your product description you state that they are suitable for children up to 4 years of age.”
There are three sizes in total according to information received from the manufacturer: swim trainer classic red = 3 months up to 4 years of age, swim trainer classic orange = 2 years of age up to 6 years of age, swim trainer classic yellow = 4 years of age up to 8 year olds. They overlap depending on the developmental stage of the child. This means when you find that your child is too big for the hoop then you should move up to the next size.