Gymboree Vintage Sizes

[monets_lily_pond]

I have a pair of boys shortalls from 1996 that are marked a size small but I'd like to indicate the size number in the listing. Any idea?

https://imgsrv.sellersourcebook.com/users/160595/dsp_767448574.jpg

[gymbo_limbo]

Vintage small= 2/3

[monets_lily_pond]

Thank You!