Why a dedicated page about inside leg lengths?
At Sioen PRO, we understand that one length does not fit all. That’s why in our outer durables layer, all work trousers, brace overalls and coveralls are available in three different inside leg lengths.
On this page, you’ll find out what inside leg length means, how to measure it correctly, and why choosing the right length is especially important for multinorm protective clothing.
What is the inside leg length?
The inside leg length (also called inseam) is the distance measured from the crotch of the trousers — the point where both legs meet — down to the floor. In workwear, it refers to the inner seam from the crotch to the hem of the trouser leg when standing upright.
In all Sioen PRO trousers, brace overalls and coveralls of the outer durables layer, we offer three inside leg options for the most common waist sizes:
Short (S) — shorter inside leg length
Regular (R) — standard length
Long (L) — extended length
This ensures trousers that are neither too long (avoiding dragging and premature wear) nor too short (preventing exposure of the ankle area). Each wearer gets the right fit for both comfort and certified protection. If you want to look up for which sizes different inside leg lengths are applicable, consult our size charts.
Protection only works,
when it fits.
The right inside leg length is essential for certified safety, ensuring full coverage, correct overlap with safety footwear, and continuous protection against risks like flame, heat, ARC, or electrostatic discharge.
How to measure your inside leg length
Measuring your inside leg length might sound easy, but getting an accurate result can be tricky — especially when doing it alone. Follow these simple steps for the best results:
Stand straight
Stand upright on a flat surface without shoes, keeping a natural, balanced posture. If possible, ask someone to assist for a more accurate measurement.Use a measuring tape
Place the tape at the crotch where the seams meet and run it straight down the inside of your leg to the floor, keeping it smooth and taut.Measure by yourself (alternative method)
Lay a well-fitting pair of trousers flat and measure the inner seam from the crotch to the hem, making sure the fabric is even and not stretched.Keep these tips in mind
Always measure without shoes, choose the longer length if you fall between sizes, and remember to account for the height of your work shoes.
Why do inside leg lengths matter — especially for multinorm workwear?
A trouser that’s too long or too short can compromise protection and disrupt how the garments work together as a certified system. Here’s why the right inside leg length really matters:
1. Certified protection relies on complete coverage
For standards such as EN 1149-5 (protective clothing with electrostatic properties), maintaining a complete conductive path from the body to the ground is essential. To safely dissipate electrostatic charges, there must be continuous contact between the trouser leg and the ESD footwear. If trousers are too short, that contact may break, interrupting the conductive path and allowing static buildup, which can cause sparks in explosive (ATEX) environments. The correct length ensures proper overlap with the shoe, maintaining continuous dissipation through the clothing and footwear to the ground.
The same principle applies to other multinorm protections, where uninterrupted coverage guarantees full-body safety.
Flame- and heat-resistant garments (EN ISO 11612) rely on full body coverage to shield skin from exposure. Too short legs can leave ankles exposed, a weak point in case of flash fire or radiant heat.
Chemical splash protection (EN 13034) also depends on overlap, preventing exposure if the trouser hem rides up.
ARC-rated clothing (EN 61482-2) requires a fully enclosed system; any gap in coverage can create a critical vulnerability during an arc flash incident.
2. Correct positioning of protective features
When trousers fit correctly, all built-in protection elements — such as knee pockets, protective layers, and reinforced areas — sit exactly where they’re meant to.
A wrong leg length can shift these positions, reducing effectiveness and comfort. Too-long trousers can also drag or fold, damaging the protective fabric and weakening its integrity over time.
3. Comfort, safety and durability
A proper fit means:
Less friction and premature wear
Lower risk of tripping or snagging
Greater wearer comfort and freedom of movement
Longer lifespan for your garment and its certifications
In short: protection only works if it fits correctly.
That’s why Sioen PRO offers multiple inside leg lengths — so every worker can benefit from uncompromised safety and comfort.