PREGNANCY PANT STRETCHING BUTTON SET Small: Stretches from 4.75 to 7 inches Ideal for First and Second Trimester (1-4 months = 1-21 weeks) Large: Stretches from 6 to 10.5 inches Ideal for Second and Third Trimester (5-9 months = 22-42 weeks) Buying maternity clothes during pregnancy can be expensive, especially because our body changes continually as our baby grows. Instead of worrying about what will fit, we can be reading books preparing for the arrival of the baby or spending time with soon-to-be big brothers and sisters. What if you could wear your existing pants, shorts and skirts by just buttoning an instant Waistband Extender to the button on your pant, short or skirt? Save time and money with this simple and comfortable solution. And the best part? The Waist Extender grows with your belly and lays gently on your stomach. The edges are sturdy cotton and the middle is a stretchy elastic so it can expand with your tummy. WARNING! Small parts. Choking hazard. Keep away from children and pets.