Systems and methods associated with an insert for expanding an article of clothing, including an article of footwear, are described. Articles of clothing incorporating such inserts are also described. The insert includes a body portion defining a first edge, a second edge, and a perimeter. Fasteners are disposed along the first and second edges. The fasteners couple to fastening structures of the article of clothing, and the perimeter of the body increases a size or circumference of the article of the clothing. The material for the insert, fasteners, fastening structures, or portions thereof can be selected to be decorative or to match, complement, correspond to, or coordinate with articles of clothing and/or accessories.