How thick is a man's urethra?

The diameter of the urethra varies from 0.5 mm to 1.0 mm. The

urethra is the path through which urine is discharged. Under normal circumstances, the kidneys produce urine and transport it to the bladder through the ureter. When urine is stored to a certain extent, it will stimulate the urination reflex, causing the bladder detrusor muscle to contract, squeezing urine into the urethra

and discharging it.