How to choose an erection ring?

If this is your first experience, then I recommend using a silicone ring without any pimples. Be sure to measure the girth of your erect member and divide by 3.14 (PI number). The size of the ring should be 5-10 mm smaller. But it is best to buy with an adjustable clasp or lasso. The maximum wearing time in the instructions is 30 minutes. I recommend reducing it to 10 so that you understand what's what. The most important! Contraindications: 1. Varicocele (male infertility). 2. Infectious diseases of the genitourinary organs. 3. Inguinal hernia, testicular cyst or epididymis. 4. Too narrow foreskin.