How to Size Big and Tall Track Suits Right
Track suit jackets and pants can fit differently at the same size number. Measure your current chest and waist before you buy — never guess from an old size.
Why a track suit that used to fit might not fit now
Bodies change — weight, build, and where you carry it can all shift between purchases, even if the number on your last size tag stays in your head. A track suit jacket and its matching pants are also cut as two separate pieces, so they can fit differently from each other at the same size label. The fix is simple: measure your current neck, chest and waist against our KingSize product's size chart instead of reordering the size you remember.
A real sizing question: 6'7", 320 lbs, and unsure between 3XLT, 4XLT, and 5XLT
A customer wrote in with exactly this problem. He's 6'7" and about 320 lbs with a 54-inch waist, and his body has changed since he last bought a track suit. He wasn't sure whether to order 3XLT, 4XLT, or 5XLT for a Colorblock Velour Tracksuit, and whether the jacket and the pants should even be the same size.
The answer starts with current measurements, not a remembered size. At 6'7" and 320 lbs with a 54-inch waist, he needs the Tall inseam length regardless of which size he lands on, and his waist measurement puts him solidly in the 4XLT size — which is why checking the chart for that exact tracksuit matters more than picking a size from memory. If his chest and waist land near the top of one size's range, sizing up to the next one gives room to move without the jacket pulling across the shoulders or the pants gapping at the waist. The jacket and pants don't have to match if his upper body and waist fall into different size ranges on the chart — a 3XLT jacket paired with a 4XLT pant is a normal, correct outcome when that's what his measurements call for.
Measure your body, not your memory
Take three measurements before you order: neck, chest and waist. Compare each one to the size chart on the specific track suit page, since jacket and pant charts are listed separately.
- Wrap a soft tape around the fullest part of your chest, under the arms and across the shoulder blades, keeping the tape level and snug but not tight.
- Measure your natural waist at the point where you bend side to side, over a t-shirt or undershirt, not over a waistband that already sits low or high.
- Measure your neck, for the jacket part of the set too.
- Check your height against the Big/Tall length notes on the product page — a Tall inseam and jacket length matter as much as the width measurements.
- Compare each number to that product's size chart, then size the jacket and the pants independently.
How much room does each size step add?
Each size step up — 3XLT to 4XLT to 5XLT — adds several inches of chest, waist, and hip room along with the same Tall-length inseam and sleeve, so 4XLT is bigger than 3XLT across the board, not just longer. The table below shows how the sizes typically relate to each other; always confirm exact inches on the specific product's own size chart before ordering, since ranges can vary slightly by style.
| Size | Fits When... | Best For |
|---|---|---|
| 3XLT | Chest and waist sit mid-range for this size on the product's chart | Men whose current measurements fall inside the 3XLT window |
| 4XLT | Chest or waist sit at or above the top of the 3XLT range | Men who've added a few inches since their last track suit purchase |
| 5XLT | Chest or waist sit at or above the top of the 4XLT range | Men who need the most room through the chest, waist, and seat |
Do KingSize track suits run true to size?
KingSize track suits are built on Big & Tall patterns from the start, not scaled up from standard sizing, so the stated measurements on each product's size chart are the numbers to trust. The most reliable way to land on the right size is still to measure your body first and match that number to the chart rather than assuming a size carries over between styles.
Shop our KingSize full range in Big & Tall track suits, including the Fila Fleece Zip Tracksuit, sized up to 10XL with Tall lengths built in.
Round out your loungewear with matching fleece
A track suit isn't the only way to build an easy, matched-up look. The fleece collection mixes and matches with your track suit pieces the same way — measure the same three points and use the individual size chart for each fleece top or pant you add.
Frequently asked questions
What size track suit do I need if I've gained weight?
Measure your current chest and waist and compare them to the specific track suit's size chart rather than reordering your old size. If either measurement sits near the top of a size's range, size up for room through the shoulders and seat.
Is 4XLT bigger than 3XLT?
Yes. 4XLT adds several inches of chest, waist, and hip room over 3XLT while keeping the same Tall inseam and sleeve length. Check the exact inches on the product's own size chart before ordering.
Should the jacket and pants in a track suit match the same size?
Not necessarily. If your upper body and waist fall into different size ranges, order the jacket and pants in their own correct sizes — a 3XLT jacket with a 4XLT pant is a normal, correct combination.