1. Your inseam is from your crotch to the floor.
2. Girth is the largest part of your body. Hips.. Chest.. ect.. whatever is the largest measurement.
3. Your pants or bra size only works if it is the largest part of your body. Even then you will want a few inches more to move around in.
4. PS: Please think about what you will wearing when you put your waders on- then adjust your measurements accordingly. Maybe
measure in the garments you usually wear out fishing or hunting to get accurate measurements
Please note: These dimensions are to help select the product closest to your size. It is best to try them on to get the best available fit. Please give yourself room to move and make sure the inseam is sufficient in length to prevent stressing the wader.