Activewear should feel firm and even, with no pinching, no gaping and no digging at the edges, and if you are between sizes you should almost always size up. Compression comes from the fabric stretching across the whole garment, not from buying it small. A piece that only feels right standing still is the wrong size for moving in, which is the only situation that matters.
This is the guide the rest of our fit content hangs off. It covers the three-movement test, what correct fit feels like area by area, why sizing down actively makes things worse, how to measure properly, and what to do when your top and bottom are different sizes.
The three-movement test
Standing in front of a mirror tells you almost nothing. Moving tells you everything. Put the garment on and do three things.
A deep squat. Go all the way down, in good light, in front of a mirror. If the leggings go sheer across the seat or thighs, they are too small or the fabric is too thin. If the waistband rolls down, it is too small or sitting higher than it was designed to.
A forward fold. Bend at the hips and let your head hang. Watch the waistband at the back. If it gaps away from your body, the pair is too big through the waist. If the fabric strains at the seat, too small.
Both arms overhead. If the top rides up past where you want coverage, it is too short rather than too tight. If it pulls hard across the chest or the armhole cuts in, it is too small.
Anything that leaves a deep mark in your skin after thirty seconds is too tight. A faint line that fades is normal; a groove is not.
What correct fit feels like, area by area
| Area | Right | Too small | Too big |
|---|---|---|---|
| Waistband | Stays put, no roll, no deep mark | Rolls down, digs in, pinches at the sides | Slides down as you move |
| Leggings through the thigh | Even pressure, opaque in a squat | Goes sheer, seams visibly strain | Bunches behind the knee |
| Crotch seam | Sits flush, no pulling in | Pulls in, creates a visible line | Sags, fabric gathers |
| Legging length | Hits where you want it and stays | Rides up at the ankle | Pools at the ankle, catches underfoot |
| Sports bra band | Firm, two fingers fit flat underneath | Cannot get fingers under, marks deeply | Rides up at the back |
| Sports bra cup | Fully contained, no spill, no gap | Spills at the top or underarm | Gaps or wrinkles in the fabric |
| Top length | Stays covered when you reach up | Pulls tight across the chest | Catches and bunches |
| Shoulders and straps | No pressure dents | Deep grooves, numbness | Slips off |
Why sizing down backfires
The instinct is that smaller means more supportive. It is the opposite, and the reason is in how the fabric is engineered.
Technical knit is designed to perform within a specific stretch range. Inside that range it compresses evenly across the whole garment and recovers its shape between wears. Push it past that range and three things happen at once.
The knit opens up. Stretch a knit far enough and you widen the gaps between the loops, which is exactly why leggings a size too small go sheer at the bottom of a squat.
Pressure concentrates instead of spreading. Fabric at the limit of its stretch cannot distribute load, so the pressure lands wherever your body curves most sharply. You feel it as digging at a few points rather than firm support everywhere, and it is the most common cause of camel toe in leggings.
The elastane fatigues faster. Held at the edge of its range every session, it loses recovery much sooner, so the garment bags out and goes sheer months earlier than it should. Our guide to when to replace your activewear covers what that looks like.
A size up gives you even compression, opacity under load, and a longer life out of the piece. It is better on all three counts.
If you are between sizes
Size up, with two exceptions.
Size up for leggings, shorts, anything with a waistband, and anything you will squat or lunge in. Size up if your hip measurement is the one sitting between sizes, because the hip is where opacity fails first.
Consider the smaller size only for a deliberately loose or oversized cut, where the fit is meant to be relaxed and a size up just becomes shapeless, and for a sports bra band where firm is the entire point, as long as two fingers still fit flat underneath.
Our guide to choosing the right size in leggings covers the legging-specific trade-offs.
Measure rather than guess
Sizes are not consistent between brands, and they are often not consistent within one brand across different styles. Measuring takes two minutes and removes all of the guesswork.
- Waist. The narrowest part of your torso, usually just above the navel. Tape snug, not tight, and do not hold your breath in.
- Hips. The widest part, feet together, tape level all the way around.
- Underbust. Directly under the bust, firm, for sports bra band size.
- Inseam. From the crotch down to where you want the hem to sit, if length matters to you.
Then use the numbers properly. If two of your measurements land in different sizes, buy the larger. You can live with a slightly roomy waistband far more easily than with a garment that goes sheer under load, and a waistband can be worn with a different top; sheer fabric cannot be fixed.
Sports bras, which are their own problem
Most of the support in a sports bra comes from the band, not the straps. Almost everyone gets this backwards and tightens the straps instead, which just transfers load onto the shoulders.
The band should be firm enough that two fingers fit flat underneath and no more. It should sit level all the way around and not ride up at the back during a session.
The cups should fully contain without spilling at the top or under the arm, and without gaping or wrinkling. Gaping means too big; spill means too small, regardless of the label.
The straps should sit flat with no pressure dents. If they leave grooves, the band is doing too little.
Match the support level to the session. Low impact for pilates, reformer and walking. High impact for running and anything with repeated ground contact. A low-impact bra worn for running is uncomfortable no matter how well it fits.
You can see the Freedom Flex Sports Bra in the current range.
Tops: length first, then fit
With tops the most common complaint is not tightness, it is length. A top that rides up when you reach overhead is short, not tight, and sizing up often makes it wider without making it longer.
Three checks. Reach both arms overhead and see where the hem lands. Check the armhole does not cut in when your arms are down. And if you will be on the floor or inverted, check it stays put when you bend forward.
For reformer, pilates and anything inverted, a longer, fitted cut that stays put beats a cropped one every time.
The Freedom Contour Tank and the Freedom Breathe Top are both cut to stay in place through overhead movement.
Compression, and what it actually does
Compression means even pressure across a whole muscle group. That is it. It helps the garment stay put, it feels supportive, and a lot of people simply prefer how it feels to train in.
What it is not is tightness. A correctly sized compression legging and a too-small one feel completely different: the first is firm everywhere, the second is firm in some places and digging in others.
If you want less compression, buy a softer, less structured fabric rather than a larger size in a high-compression style. A high-compression pair sized up tends to slide rather than hold.
Fit changes, and that is normal
Bodies change week to week and month to month, and activewear is the least forgiving thing in the wardrobe about it. A pair that fits perfectly most of the time can feel wrong for a few days, and bloating is the usual reason.
That is an argument for owning one slightly more forgiving piece as well, not an argument that the size is wrong. Our guide to what to wear training on your period covers the week where this matters most.
Wrong size, or worn out?
These get confused constantly, and the fix is different.
| Symptom | Wrong size | Worn out |
|---|---|---|
| Goes sheer in a squat | If it did this from day one | If it used to pass and now does not |
| Waistband will not stay up | Too big, or band sitting too high | Elastane in the band has fatigued |
| Digs in and leaves grooves | Too small | Not a wear issue |
| Bags at the knees or seat | Too big | Fabric has stopped recovering |
| Bra band feels loose | Too big from the start | Band elastic has gone |
Buying online
Measure first, buy to the larger number, and do the three-movement test at home in good light before anything goes near a wash. Once a garment has been washed it is usually no longer returnable, and the squat test is the one that tells you the truth.
If your top and bottom sizes are different, that is completely normal and the reason most activewear is sold as separates. Buy the size that fits each piece rather than trying to be one size throughout.
You can see the current range in bottoms and tops, including the Freedom Cross Leggings and the Freedom Staple Leggings.
Frequently asked questions
Should activewear be tight or loose?
Firm and even, with no pinching or digging. It should hold without restricting, and stay opaque and in place through a full range of movement. Tight enough to leave deep grooves in your skin is too tight.
Should I size up or down in leggings?
Size up. Compression comes from the fabric stretching across the whole garment, not from buying small. A size too small goes sheer in a squat, concentrates pressure in a few places, and wears out faster.
How do I know if my leggings are too small?
Squat deeply in front of a mirror in good light. If the fabric goes see-through, the waistband rolls, or the seams visibly strain, they are too small regardless of what the label says.
How tight should a sports bra band be?
Firm, with room to fit two fingers flat underneath. Most of the support comes from the band rather than the straps, so it needs to be snug, but it should not leave deep grooves or restrict breathing.
Why do my leggings roll down at the waist?
Usually a size too small, or a waistband being worn higher than it was designed to sit. A wide high waistband in the correct size distributes pressure and stays put.
Do I measure my waist or my hips for leggings?
Both, and size to the larger of the two. The hip measurement is the one that decides whether the fabric stays opaque under load, which is the failure you cannot fix.
Does activewear stretch out over time?
Yes. Elastane fatigues with wear, heat and washing. Buying a size too small accelerates it, because the fabric is held at the edge of its stretch range every time you wear it.
What if my size is different on top and bottom?
Completely normal, and the reason most activewear is sold as separates. Buy the size that fits each piece rather than trying to be a single size throughout.
Why does my activewear feel tighter some days?
Bloating, which is common and temporary. A pair that fits comfortably most of the month can feel restrictive for a few days. That is a reason to own one softer pair, not a sign the size is wrong.
How should activewear fit for reformer pilates?
Fitted and staying put, because you will be inverted. Full-length leggings in a denser knit, in your actual size, and a top long enough that it does not ride up when you bend forward or reach overhead.
The short version
Firm and even, nothing digging, nothing gaping. Test it by squatting, folding forward and reaching overhead rather than standing still. Between sizes means size up, especially for anything with a waistband. Measure waist, hips and underbust, use the larger number, and remember sizes are not consistent between brands or even between styles.
