If a person have right side varicoceles then how long would it take testicle to shrink? does it shrink in all cases?

Varicocele: Right sided varicoceles are rare. The size of the testicle may or may not be affected by a varicocele. I would see a urologist..

Unknown: Varicoceles (swollen spermatic veins) are fairly common. They can be associated with discomfort, shrinkage (or "atrophy") of the testicle on that side. In some men with infertility and varicocele, repair may improve subpar semen parameters and fertility. However, in the absence of the above conditions, varicoceles do not necessarily require repair, as they may not lead to those problems.