From Oliver + S:
This messenger bag won’t let you down. It has room to carry lunch, a water bottle, a laptop computer, a sketchbook, and a few other necessities, but it doesn’t look bulky. The pattern comes in two sizes: one for children up to age 5 and the other for older kids and adults. If you use the suggested strap adjuster hardware, the bag can grow with the child or be used by people of different sizes.