Condoms are designed to adapt to the vast majority of penis sizes, and there are specific sizes that are meant to fit the bigger ones. If you don’t fit into those, you will likely have a lot of trouble fitting into a vagina in the first place. Condoms might feel tighter on you if you’re bigger, but the vast majority of the time they should work as intended. Don’t use your size as an excuse to not use protection. There are condoms made for you that you can get if you put the effort in.

Edit: In terms of anal sex, it goes without saying that the bigger you are, the more preparation you’ll need to accommodate the size, assuming the individual anus has the eventual capacity for it in the first place.