Question: are all barbells the same size?
Answer: Barbell Basics. Before you can truly make an informed decision you need to know exactly what a barbell consists of — its “anatomy.” A commonly used barbell has a 28-29 mm diameter shaft for men and 25 mm for women. Barbells come in all shapes and sizes, but the standard length is 7.2 ft for men and ~6.5 ft for women.