I would go without arms - sometimes the arms get in the way of being able to fully turn. Also when you are sewing, your arms aren't going to be on the arms - they are going to be out in front of you. I would suggest that you go with him to pick out a chair. My husband is 6 ft 3 inches and what feels good to him is too large for me. Get a good chair with good lumbar support, a back that can me moved to be more upright rather than reclining, a seat that fits your bottom, and the ability to adjust the seat height. Happy birthday!