These bags have so many uses:  for school, work, diaper bag, lunch bag if you bring that much stuff with you, knit/crochet bag, project bag, even market bag. I put in 4 slip pockets and a key clip so you don't have to fumble for keys. My favorite part of it is the zipped panel on top to keep everything secure. I always tip my bags over. It's not too big that you'll hurt your shoulders. The nylon strap will last for a very long time. Measurements in inches:
16 x 11 x 6 (bottom width)
Let me know if you need a bigger size.