Is this a trick question? Why in the world would you round up or down when you will end up with a measurement that is not how long your penis is?
If it says 7.25, then it’s 7.25.
Just so you know, the 2 best ways of measuring are
1. When fully erect, stand up, hold your penis pointing straight out, away from your body, place the ruler on top of your penis and push the ruler against your pubic bone and measure. Remember, nor under the penis, not to the side, but right above it resting on your penis.
2. Again standing up, this time flacid, grap the head of your penis and stretch it out away from your body, place the ruler again on top of your penis, bone pressed, and measure.
These in my opinion are the two most accurate ways of measureing length. And never round up or down, you want to keep track of your real size.