: Measure around the narrowest part of your torso, usually near the belly button.

this just goes to show that denim sizing is all a lie like these Diesel jeans are a size 24. and my Levis's lowrise are a size 28. TikTok·kristywho_ Men's Denim Guide: regular, bootcut, relaxed, slim, skinny

Your ideal size will shift depending on the specific "fit family" you choose:

: Because Diesel leans toward a slim, European aesthetic, many buyers find success by choosing one size larger than their typical waist measurement. This is especially true for non-stretch, 100% cotton denim which has zero "give" and may shrink up to 5% after the first wash.

: These are designed to be ultra-fitted. If you are between sizes, always size up to avoid a "painted-on" look that pinches the waist.

: If the jeans contain at least 2% elastane (stretch), they are more forgiving and typically stay "true to size" or allow for a snugger fit. For rigid, fixed-fabric denim, sizing up is almost mandatory to avoid restrictive movement. Fit-Specific Recommendations

Don't rely solely on your "usual" size. Instead, use a soft measuring tape to confirm two specific areas:

To navigate Diesel's sizing, you must balance three critical factors: