We recommend that you measure anytime after your 8th month. You could follow these recommendations when you are ready to order:
In the eighth month many women will be the same size as they will be post delivery. Simply measure the part of your tummy that is the biggest all the way around your abdomen, which is usually at the belly button. Choose the corresponding band for your size.
Just prior to delivery simply subtract 3 to 5 inches from your belly measurement. Select the corresponding band for that size.
After Delivery simply measure and choose the corresponding band size for your belly size.