Go for brand names like Durex and Trojan. If you are really worried about worn and torn, go for "regular" instead of ultra thin, and look for those with spermicide lubricants. But the most important part is not how thin or thick the condom is, but how you handle the condom when you open the seal and how you wear it. Read the instruction inside the pack/box of the package. They have very good instruction on how to wear/ put on a condom.
Usually it comes with pack of 3, pack of 6, box of 12 and 24. Price varies from shop to shop.