You are buying 1 sealed, new in packaging-each bag has 2 arms and 2 legs.
There are 3 bags available, each separate to purchase.
These are NOS-new old stock from 1990.
The size is medium the item no is 42001
The measurements of the feet and arms are in the photos.
We are not experts by any means, but happy to answer questions so you are happy with your purchase