How to Choose Your Size in PDF Sewing Patterns (XS–5XL Guide)
If you've ever bought a "medium" pattern and had it fit like a tent — or a sausage casing — here's the truth: retail clothing sizes and pattern sizes are different systems. Forget the size you buy in stores. In pattern land, only your tape measure tells the truth.
Take your measurements properly
You'll need a soft tape measure and, ideally, a friend. Stand relaxed — no sucking in, no puffing out. Measure over the undergarments you'll wear with the finished garment.
- Bust/chest: around the fullest part of your chest, tape level all the way around. Keep one finger between tape and body.
- Waist: around your natural waistline (the crease when you bend sideways), not where your jeans sit.
- Hips: around the fullest part of your hips, feet together.
- Back waist length (for fitted bodices): from the nape of your neck to your natural waist.
Write all three down in both inches and centimeters. You'll use them on every pattern you ever sew — keep them in your phone notes.
Compare against the pattern's size chart — not the envelope vibe
Every PrimePatternHub listing includes a size chart with body measurements. Find the size where your measurements land. Two things to know:
- Body measurements vs. finished measurements: the chart lists body sizes; the finished garment includes wearing ease. Don't size up "for comfort" — the ease is already built in.
- Pick by your most important measurement: for a vest, that's usually the bust or chest. For fitted bodices like our Leather Corset Top, it's the waist.
Understanding ease (the hidden number)
Ease is the difference between your body and the finished garment. A moto vest needs 2–4″ of wearing ease to move comfortably; a corset belt wants close to zero or even negative ease to cinch. Good patterns tell you the intended fit — "close-fitting," "relaxed," "oversized" — and the size chart's finished measurements let you verify. If a vest's finished chest is 4″ bigger than your chest measurement, that's the design doing its job.
Between sizes? Blend them.
Almost nobody is one size everywhere — say you're a medium bust and a large waist. In a layered PDF, print the medium for the upper pieces and the large where you need room, then blend the lines smoothly between them at the transition. Our patterns are drafted for exactly this: the grading is consistent across the XS–5XL range, so blended lines stay smooth.
How to blend: on each affected piece, mark your bust size at the top and waist size at the bottom, then draw a gentle curve connecting them. It doesn't need to be perfect — fabric is forgiving of smooth transitions.
How our XS–5XL grading works
Our range runs from XS to 5XL in every pattern — no separate "plus" block with different drafting. Because the PDFs are layered, you print only your size (or your blended sizes) instead of a spiderweb of 11 overlapping line sets. The Women's Leather Vest and Men's Hooded Leather Vest are good examples: same careful grade at every size.
When to size up vs. size down
- Size up when you're between sizes on a structured garment with no stretch (leather vest, corset) — taking in is easier than letting out.
- Size down when the style is meant to be close-fitting and your measurements sit at the top of a size's range.
- Check the finished measurements first — they override every rule of thumb.
The muslin question
For fitted garments in expensive fabric, sew a quick test version ("muslin" or "toile") in cheap fabric first. For faux leather projects, an old bedsheet works fine for checking fit — the drape won't match, but the measurements will tell you what you need. For loose garments like cloaks, skip it; fit barely matters.
Measuring for someone else
Sewing for a partner or a friend? The rules don't change, but the diplomacy does. Measure over their usual undergarments, keep the tape snug but not tight, and write down all three numbers without commentary. If they're between sizes on a gift, choose based on the garment's ease: structured pieces (vests, corsets) favor the larger size since taking in is easy; relaxed pieces (cloaks, shrugs) favor the smaller. And never guess someone's measurements — a two-minute measuring session beats a garment that never gets worn.
Still unsure? Ask us.
Sizing questions are the most common messages we get, and honestly, they're our favorite — a two-minute check now beats a disappointing sew later. Send us your three measurements and we'll point you at the right size before you cut.
Find your fit: every pattern in the shop includes a full XS–5XL size chart and layered files — start with the Leather Shoulder Shrug for a forgiving first fit.