Are there different sizes available in condoms?

Q: Is there any variation in the size of condoms or we can buy any? To prolong the duration of intercourse can I use Climex? Does it have any side effect and will it create erection problem in future?

A:1. In India, the condoms available are free size (can fit any one).2. Sorry, we don't advise use of any medicines through this column without examining/investigating the patient.