Petunia Boxy Backpack - Sand/BlackA modern mother's quintessential companion, the iconic Boxy Backpack now features a newly updated design, lighter weight construction, and comes with Stroller Straps. This top selling diaper bag ensures that every detail is at the ready with a clever built in changing station, organizational pockets, and multiple carrying options. It is available in a variety of trend setting prints, colors, and fabrics. DIMENSIONS Boxy Backpack: 13" W x 13. 5" H x 5.