Here are the things you will need:
- soft measuring tape
- 1/2-yard soft cotton patterned fabric (amount of fabric will vary depending on dog’s size)
- 1/2-yard lightweight standard interfacing
- 4″ to 5″ strip of 1″ wide white sewable Velcro
- thread
- fabric shears
- pins
- decorative buttons, bows or appliques
Source: http://www.hgtv.com/crafting/dog-dress-with-pattern/index.html