In brief
Maternity scrubs sizing is simpler than most people expect: in most styles you buy your usual pre-pregnancy size and let the stretch panels, waistbands and side vents do the growing. This guide explains how maternity scrub tops and trousers should fit, what changes from one trim
⏱ Reading time: 7 minutes
Choosing scrubs online is tricky enough. Choosing them while your body changes week by week is harder. Buy too big and the fabric swamps you early on. Buy too small and you'll be pulling your top down over your bump by the third trimester. This guide explains maternity scrubs sizing in plain terms, using the size charts and customer feedback for the maternity scrubs.
How Does Maternity Scrub Sizing Work?
Maternity scrubs use the same XXS to 3XL scale as regular scrubs, with extra room built in for the bump and bust. Stretch fabric, knit panels and adjustable waistbands do the rest, so you size for your pre-pregnancy frame, not for the bump you expect in month nine.
The charts show this clearly. On our size guide, Cherokee Revolution maternity sizes share the waist and hip ranges of the brand's standard women's chart, with a little more room in the bust. Koi's maternity chart lists a much larger waist (44 inches for a medium, against 29 to 31 inches in standard Koi sizing), reflecting the room designed into the garment.
Should You Buy Your Pre-Pregnancy Scrub Size?
For most people, yes, ideally in the same brand, since sizing varies between manufacturers. If you were already between two sizes, the larger one usually leaves more room for later. New to a brand? Measure yourself rather than guessing from your dress size.
Which Measurements Should You Take?
Use a soft tape measure and keep it snug but not tight:
Bust: around the fullest part of your bust.
Hips: around the widest part of your hips.
Inside leg: from your crotch down to your ankle.
Bump: around the fullest part. It won't decide your size, but it shows how much give a waistband has left.
Charts rarely list shoulder width, so use a well-fitting pre-pregnancy scrub top as your reference, and measure again each trimester.
How Should Maternity Scrub Tops Fit?
A maternity scrub top has two jobs: fit like your usual top across the upper body, and leave plenty of room below the bust. Check it in that order.
The Shoulders and Chest
Your shoulder width doesn't change much in pregnancy, which makes it the most reliable guide to size. The seam should sit at the edge of your shoulder, not halfway down your arm. Across the chest, the top should stay in place when you lean over a bed or dental chair. A little ease in the bust is welcome; a V-neck that gapes every time you bend is not.
The Bump and Front Length
A bump takes up fabric, so the front hem rises as you grow. The Koi Next Gen Onboard maternity top handles this with front and back pleats and long side vents, while the Cherokee Revolution mock wrap top has a soft knit front panel and side zip gussets you can open out. Either way, the front hem should still cover your trouser waistband.
Sleeves and Arm Movement
Try the reach test: raise both arms as if hanging a drip. Sleeves shouldn't bite into your upper arm, and the top shouldn't ride up above your waistband. Stretch helps here: Koi Next Gen is a 4-way stretch fabric, Cherokee Revolution a 2-way stretch.
Signs Your Top Is Too Small
- Horizontal creases pulling across the bust or bump.
- The neckline drags down or opens when you reach forward.
- The front hem sits above your waistband, even standing still.
- Side vents are pulled wide open.
Signs Your Top Is Too Big
- Shoulder seams hang down onto your upper arm.
- The neckline gapes when you bend.
- Loose fabric catches on bed rails, trolleys or equipment.
- It looks like a tent, and the shoulders still won't fit in month eight.
How Should Maternity Scrub Trousers Fit?
Choosing the Right Waistband
There are two main designs. An over-the-bump panel, like the soft knit panel on the Cherokee Revolution maternity trousers, gives full coverage and stays put when you bend. An under-the-bump design, like the Koi Next Gen On The Move maternity trousers, combines a double elastic waistband with side elastic panels and an adjustable back. Neither is better; go with what feels right. A full panel also works early on: one customer at 20 weeks simply folded the Cherokee waistband down.
Fit Around the Hips and Thighs
Squat as if reaching a low cupboard, then kneel as if beside a patient. Nothing should pull across the seat or cut in at the thigh, and the crotch shouldn't hang low, which signals a size too big. Several customers find the Cherokee maternity trousers roomy, worth knowing if you sit at the lower end of a size range.
Choosing the Right Trouser Length
Your inside leg doesn't change in pregnancy, so choose on measurement. The hem should just touch your shoe at the back without dragging on the floor. The Koi On The Move trousers come in Regular and Petite (a 31-inch and 29-inch inside leg on the Koi chart); the Cherokee Revolution maternity trousers come in one length.
Maternity Scrub Fit by Trimester
Every pregnancy is different, so treat this as a rough guide. Scrubs are also only one part of working while pregnant: in Ireland your employer must carry out a pregnancy risk assessment, and the Health and Safety Authority explains what it covers.
First Trimester
Many people carry on in their usual scrubs. A fitted waistband often starts to feel uncomfortable before there's a visible bump, which is usually the first sign to switch trousers. Tops can wait. If you buy now, choose adjustable pieces, such as the Cherokee top, whose side zips can stay closed while your bump is small.
Second Trimester
This is when maternity scrubs usually become a necessity. Regular trousers dig in when you sit down to write notes, and your bust may need more room. Buy tops and trousers together, ideally from the same collection so the colours match, and measure again first.
Third Trimester
Front length and waistband coverage matter most now. Open out side zips or vents, check the hem still covers your waistband, and make sure the trouser panel stretches without rolling down. If something feels tight but the shoulders still fit, you need more bump room, not a bigger size.
Maternity Scrub Sizing Mistakes to Avoid
Automatically Sizing Up
A bigger size makes everything bigger: shoulders slip, the crotch drops and hems drag. Maternity scrubs already allow for your bump, as our guide to the best maternity scrubs to wear when you are pregnant also explains.
Ignoring the Size Chart
Brands don't size alike. On our size guide, a Koi women's medium is a UK 12, while a Cherokee Revolution women's medium covers UK 14 to 16.
Ignoring Your Shoulders and Hips
The bump is the part maternity scrubs are designed to handle. Shoulders and hips are where a wrong size shows, so check them first.
Forgetting Trouser Length
Stretch panels grow with you; hems don't. Measure your inside leg and pick Petite or Regular where the option exists.
Buying for One Trimester Only
Buying for today's bump means buying again in eight weeks. Side zips, adjustable backs and full stretch panels let the same pieces take you through to maternity leave.
Shop Maternity Scrubs at Happythreads
Our Koi and Cherokee maternity ranges take two different approaches to fit:
Cherokee Revolution Mock Wrap Top
Soft knit front panel and side zip gussets you can open as you grow. Two front pockets.
Cherokee Revolution Straight Leg Trousers
Full over-the-bump knit panel, side vents and three pockets. Single length.
Relaxed fit with front and back pleats, long side vents and 4-way stretch fabric.
Koi Next Gen On The Move Trousers
Under-bump double elastic waistband, adjustable back and eight pockets. Regular and Petite.
Getting your maternity scrubs sizing right comes down to a few simple checks. Start with your pre-pregnancy size, then judge the fit by your shoulders and hips rather than your bump. Choose a waistband that feels comfortable, and pick a leg length that suits you. Get those right and the same pieces should see you comfortably from your first shift in maternity scrubs through to maternity leave.
Maternity Scrubs Sizing FAQs
What size maternity scrubs should I buy?
Buy the size you wore in regular scrubs before pregnancy, ideally in the same brand. Maternity scrubs already include extra room for your bump and bust, so sizing up usually leaves the shoulders, hips and hems too big.
Should maternity scrub trousers go over or under the bump?
Either works, and it comes down to personal comfort. Over-the-bump panels give full coverage and stay in place when you bend, while under-the-bump waistbands sit lower and often have adjustable features for a closer fit.
Do maternity scrubs come in petite lengths?
Some do. The Koi Next Gen On The Move maternity trousers come in Regular and Petite lengths, while the Cherokee Revolution maternity trousers come in one length. Measure your inside leg and check the options on each product page.
What should I do if I'm between two sizes?
Check your shoulders and hips first, as these change least in pregnancy. If you're still between sizes, the larger size usually leaves more room later, especially in tops with side zips or trousers with an adjustable back.