Vintage BRI-Nylon children's PE shorts.  Three Imps brand.  Made in the mid 1970s, but never used (unsold shop stock).  Elasticated waist. Fully lined.

Machine washable.
Marked as age 5-6 approx (please bear in mind that children nowadays are on average rather larger than they were in the 1970s, so they might be more like a modern size 4-5).
Waist measurement is 16 inches unstretched, 22 inches fully stretched.  
Waist to hem measurement is 9 inches.

Condition: Vintage clothing, nearly half a century old, but never used and still in perfect condition.  Some (but not all) of the shorts still have a separate label with the washing instructions on - see photograph for details of the washing instructions.