Heavyweight Clothing Size & Fit Guide

GSM measures fabric weight in grams per square meter. It does not determine clothing size.Our 420 GSM single jersey T-shirts and 420 GSM French terry sweatshirts, hoodies, and sweatpants use different knit constructions and garment patterns. STRATA woven cargo trousers and track jackets use separate fabrics and sizing specifications.Fabric weight can influence drape and structure, but fit is defined by the relationship between the pattern, finished dimensions, material, and body.To explore our approach to fabrics and construction, visit The Tactile Paradox.

Start with a garment you already own and like wearing.Lay it flat on a level surface, smooth it gently without stretching the fabric and compare measurements using the same reference points.Measuring TopsHalf Chest: Measure straight across from underarm to underarm.Body Length: Measure from the upper shoulder point near the neckline to the finished bottom hem.Shoulder Width: Measure across the back between the shoulder seam points.Sleeve Length: Measure from the shoulder seam to the finished sleeve opening.Measuring BottomsWaist: Measure across the waistband according to the product's relaxed or extended measurement instructions.Hip: Measure across the garment at the point specified in its size chart.Thigh: Measure across the upper leg at the specified reference point.Inseam: Measure from the crotch seam to the finished leg hem.Leg Opening: Measure straight across the finished leg opening.For waist and other flat-width measurements, double the width only when you need an approximate full circumference and the product instructions support that comparison.Measurement positions can vary by construction. Follow the individual product's measurement diagram where provided.

For MX Signature and BX Armor short-sleeve T-shirts, Size M is developed around a wearer with a body chest of approximately 112–122 cm (44–48 in), which may overlap with people who normally wear men's XL in other brands. This is a fit reference, not a universal size conversion. Check your body measurements and the finished garment chart first.

Start with the size recommended for your body measurements, then compare the finished garment dimensions.Sizing down may reduce volume, but it also changes shoulder placement, sleeve length and body length.Sizing up may add room and length, but it can alter the balance of the original silhouette.If you are between sizes, compare both options with a garment you already own.For categories beyond our core heavyweight T-shirts, follow the individual product's fit guidance.

Our core heavyweight T-shirts are intentionally generous, but they are not all shaped alike. MX Signature and BX Armor use the structured Architectural Boxy pattern. WX Core and EX Essential use a longer, roomier Oversized Relaxed pattern. Other product categories have separate sizing requirements. Compare the finished measurements before choosing.

Our fit is intentional rather than based on a universal industry size conversion.Start with your body measurements and refer to the recommended size range. Then compare the finished garment chart to understand the silhouette.Your usual size in another brand can be useful context, but it should not be your only reference.

A boxy fit emphasizes width in relation to body length, creating a more squared-off silhouette. An oversized relaxed fit typically has additional room and length. REALLY COOL® uses two distinct patterns, so the difference is visible in the finished garment measurements, not just the description.

Our MX Signature and BX Armor Size M is intentionally developed around a wearer with a body chest of approximately 112–122 cm.This overlaps with the body measurements of many people who typically choose men's XL in US or European brands.However, size conventions vary. This is a wearer reference, not a universal M-to-XL conversion.

They share the same recommended body chest size ranges, but not the same finished garment measurements.For example, EX/WX Size M is 5 cm wider across the half chest and 4 cm longer in the body than MX/BX Size M.Choose the size using your body measurements, then compare the finished dimensions of the silhouette you want.

Yes.Both use the same Full-Length Oversized Relaxed pattern and finished garment measurements.EX Essential's 2.5 cm ribbed-knit hem is included within the garment's finished length. It is not an additional extension or cropped treatment.

Start with the intended fit of the particular style.Compare chest width, garment length, shoulder construction and sleeve measurements. Also consider whether you plan to wear a T-shirt or another layer underneath.Refer to that product's size chart for exact measurements.

Begin with waist and hip measurements, then review rise, thigh width, inseam and leg opening.A straight-leg sweatpant, wide-leg sweatpant, sweat short and cargo trouser can all create different proportions even when they share a waist size.Use the individual product's specifications rather than a general T-shirt size conversion.

Consider shoulder placement, chest width, body length and the room needed for layering.The track jacket has its own design and construction, so its measurements should be compared with the jacket or outer layer you already prefer wearing.

No.Our core heavyweight T-shirts share one recommended body chest chart and two distinct finished-garment pattern systems.Other garment categories are developed around their own proportions, measurement points and grading.Always refer to the specific product page for the most relevant fit information.

Cotton garments can experience dimensional changes depending on construction, finishing, and care. Our signature jersey platform has undergone documented dimensional-stability testing, but results from tested samples should not be treated as a universal guarantee for every garment. Follow the product's care label and refer to its specific specifications.