Bento bags are a popular Japanese style of bag and a great way to carry small goods, for your fruit and veg, wrap a present in or my favourite a project bag.
There are various verisons of this available, from small to large. Small and Medium sizes have an exposed seam, large size have a rolled seam.
Small: 9cm x 23cm and 10cm
Medium: 10cm x 25cm and 12cm
Large: 11cm x 32cm base and 15cm high at centre.
If you'd like to make your own, check out the blog on the two different ways to create these practical, versatile bags.