Leisure Arts A Year of Afghans Book 4 May Crochet ePattern- Crocheted shell pattern using worsted weight yarn and a size H, 5.00 mm hook. Includes assembly instructions. Finished afghan measures approximately 51"x 69". Designed by Rhonda Semonis. Afghan pattern can be found in eBook LEA36002382, A Year of Afghans Book 4. PDF download.