This is a drawstring bag available in three sizes.
The small bags are my favourite, I think. In craft storage terms, they’ll work for sock projects or doily projects. The medium size is good for shawls in lace weight yarn or baby clothes. The large size is really large and could comfortably hold blanket projects.
The photo with a bag on my hand is that of the smallest size.
Small: 6”x4”x6.5” Medium: 10.5”x5”x10.5” Large: 14”x6”x12.5”
They’re all lined with plain canvas and have simple pockets inside for small stuff so that you won't lose your hooks/needles/scissors and other notions.
They are ideal for carrying around your craft projects, crochet, knitting or sewing, for example.