I make this style fully lined, with two extra inches of rise for a vintage look. I am wearing a Medium in the photos, my waist measures 34 inches. I use 1 inch wide elastic in the waistband, with a concealed drawstring for added security.
Sizing
XS 24-26, S 28-30, M 32-34, L 36-38, XL 40-42, 2XL 44-46, 3XL 48-52, 4XL 54-58
Because I make every swimsuit to order, please understand there is a 2-3 week processing period.