In general, panels sizes are: Toddler/Child Panel 14" x 18" (recommended for 12 months to slim 5T) Big Kid Panel 21" x 28" (recommended for 2T- Teen and XS adult. Can also be used for panties or kanga pockets, depending on graphic size.) Adult Panel 30"x 35" (Adult and teen size, but also for 3T-6Y GWM rompers and big kid (5+) panel dresses.) - To see more information on styles you can have made, please see our custom style catologue here. You will need to return to this listing to place your custom fabric deposit!