How are Square Variants imported into Craftybase?
As Square allows for only one attribute per product, your variation attributes will be imported with a default label of "Variant" (this can be changed by you after the import to a label that better represents the attributes).
For the example above created on Square, the Product would be imported as "Cats Skirt" and a Variation Attribute of "Variant" would be created with 3 values: 0-1 years, 1-2 years and 2-3 years.
From here, you can edit your Variation Attribute to change the label to better represent the group of values. For the example above, you could rename Variant to Size. (Note: this will not update your label on Square, it will only be used within Craftybase to describe the Square variant)
Square Item Modifiers are not imported as variation attributes - instead they will be added to the notes section of any orders that have the modifier applied.
More information about Square Variants can be found in the Square documentation article: Item Variants or Price Points