Vintage "Wee Bairn" Plastic Bags

These must have been for baby pants ? 
The Best for Baby
"Wee Bairn" made in England
Guaranteed Hygienic
Tested By The LUX WASHABILITY BUREAU
(that famously rigorous institution)
The bags havent been used and are 16 x 20cm big
The price is for 1 bag.