When shipping, the box will be bulky, so to keep the package under 3cm in height, it will be shipped without the box. Includes instructions. 【How to Choose Your Size】 With a shirt on, measure the larger circumference of your waist (abdominal circumference) and hip (around the hip bone, the largest part of the greater trochanter). *If you're unsure of your size, choose the larger one. Same-day shipping available.