This is an easy pattern for a beginner crocheter.
Main stitches used are chain, and double crochet.
For the straps you’ll use single crochet and half double crochet.

The pattern is in US terms and includes a sample chart and photos along with written instructions.
Choose from three lengths and make to your desired width. Suggestions for sizes XS through to 3XL included.

Yarn: cotton or cotton blend 8ply/dk/light weight yarn
Hook: 4mm

Extra materials needed:
Tapestry needle, stitch markers (2), measuring instrument.