Thank you for reaching out.
Unfortunately, I have no insight into the item you are looking out. Usually, if sizing is Size1, Size 2, Size 3, Size4 - the seller provides a chart that contains the measurements associated with the numbering.
If the item description is missing information, you can report it by scrolling down to the bottom of the listing and tapping/clicking on "report this item." Please be specific in the comments about why you are reporting the item.