I use a sizing system of: XS, S, M, L, XL, XXL based on the European standard sizing. All pieces are true to size. Email me with the designs you want and measure yourself around your waist, hips, widest part over your chest and under in cm.
Between two sizes? Your right style and size will also depend on how you want to wear them – showing more skin, or less; sunbathing or surfing. I would recommend going for a size smaller if you are between two sizes since the fabric is super elastic and formes after your body.
Most designs is designed with adjustable options to really get the perfect fit.