A ballerina's shoes are her tools. It is of the utmost importance that they fit correctly and stay on while she kicks, spins and moves around. Elastic straps help keep the slipper secure at all times so long as they are properly sewn on. Learn to sew elastic straps on to ballet shoes like a professional and you'll be ready to dance in no time.
Put the shoes on and begin to break them in so they stretch a bit and take on the form of your foot.
Unroll a foot or so of elastic band. Set the end against the inside edge of the shoe and lay the elastic across the shoe. Allow for an extra 1/2 inch on each side. Cut a piece of elastic for each shoe.
Take a piece of elastic and fold 1/3 inch of elastic down on the inside of the shoe beside the inner ankle.
Sew the strap onto the shoe by stitching around the edges of the folded elastic section. Tie the ends of the thread into a double knot.
Stretch the strap straight across the slipper. Fold the elastic end down 1/3 inch and sew to the side.
Try on the shoe to make sure the strap fits well. It should be snug but not so tight that it's uncomfortable or cuts off circulation.
If the shoes are painted or coloured, then spray paint or dye the elastic straps to match.