Size 18 fits size small if you try it on and it fits.
This size small human looks great in the garment as well. Don't look at sizing labels- it's unstandardized and not realistic

Lil Striped Number Sweater Dress

Sold out
$68.00
Shipping calculated at checkout.

Free people white with black white red and purple stripes 

marked small 

see pics for reality

Sold to a customer turned friend.