Hand crocheted Crop Tank Top by Washington Collective It's easy, here's how to get started! 1. Measure from the top of your bust/chest down to your waist 2. Measure around your bust and subtract ~ 2 inches (since this stitch has give even for larger busts!) 3. Create your chain, it should be about the length you want your top to be (measurement from step no. 1) 4. Half double crochet in the back loop only until your work is the length of measurement from no. 2