I crocheted a small case using thick, turquoise green recycled cotton yarn. It could also fit a smartphone if the size is right. You could also use your own shoulder strap to make it a smartphone pouch. Because it's thick yarn, it has a good thickness. The strap is from Seria. Please check the size in the photos. Please note that the color in the photos may differ slightly from the actual product. This is a handmade item, so there may be some imperfections such as uneven stitches or slight distortions. Please understand and accept this before purchasing. Please be aware that the item will be flattened for shipping. Instant purchase is welcome.