In this tutorial, we learn how to make a bikini bottom. First, measure the widest part of your bottom area, then write this number down. Next, place your fabric where the measurement device just was, then mark where you want your underwear to fit. Mark this spot, then measure the lines out on the fabric. After this, use a pen or marker to mark the underwear shape. After this, cut out the shape of the underwear and pin all sides together. Now, sew the sides of the bottoms together, then flip them inside out. After this, you will have a cute new pair of bikini bottoms that were made by you and at a great price!