How to determine belt size<br>Wear pants that fit well. Put on a pair of jeans or pants that you will wear frequently with a belt. These pants should not be too loose or too tight so that you will be able to get an accurate measurement of your waist.
Can we infer the following?
If these pants are too tight it might throw off the measurements. 

OPTIONS: +Yes; +It's impossible to say; +No;
The answer is:
Yes