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.
Wearing pants that are 10 sizes too big should allow an accurate measurement of belt size, according to these instructions. 
( z1 say :ARG0 ( z2 instruct :mod ( z3 this ) ) :ARG1 ( z4 recommend :ARG1 ( z5 allow :ARG0 ( z6 wear :ARG1 ( z7 pants :mod ( z8 big :ARG2-of ( z9 have-degree :ARG1 z7 :ARG3 ( z10 too :quant ( z11 size :quant 10 ) ) ) ) ) ) :ARG1 ( z12 measure :ARG1 ( z13 size :mod ( z14 belt ) ) :mod ( z15 accurate ) ) ) ) )