F I L O R O S S O belts are standard sizes.
The table below shows which belt size corresponds to standard pants sizes. Each belt has 7 holes 1-1/2” apart, and these sizes are based on using the middle belt hole.

Pants Size Belt Size
Size 29-31 pants 34 - S
Size 31-33 pants 36 - M
Size 33-35 pants 38 - M
Size 35-37 pants 40 - L
Size 37-39 pants 42 - L
Size 39-41 pants 44 - XL
Size 41-43 pants 46 - XL
Size 43-48 pants 48 - 56 XXL