The short answer
- A women's size 28 is usually about a US 6, and some brands call it an 8. The number is a waist label, not an exact waist.
- On one published chart, a 28 fits a body waist of about 28.5 to 29.5 inches and a hip of about 38 to 39.5 inches.
- US numbers (0, 2, 4, 6) and denim numbers (24, 25, 27, 28) are two different systems that happen to overlap.
- Brands cut the same number differently, so a chart is a starting point. Your waist and hip measurements travel better than a label.
You are standing in a fitting room with a 28 in one hand and a size 6 in the other, wondering which one is lying to you. Neither is, exactly. Women's jeans are labelled in two overlapping systems, and nothing forces brands to agree on what either one means. Here is how to translate between them, how far to trust the result, and what to do when the label stops being useful.
Size 28 in jeans: the quick answer
Most charts pair a denim size 28 with a US misses size 6. A few put it at an 8. Madewell, for one, says a women's 28 is a 29-inch waist that typically corresponds to a US 8 (Madewell denim guide). Kiwisizing's table puts a US 6 at roughly a 28-inch waist (Kiwisizing). Different brands, a one-size difference, and both are normal.
A typical conversion table
This is one published conversion chart, shown to give you the pattern. It lists the body measurements a jean size is meant to fit (source: Size.ly).
| Denim size | US numeric | Letter | Body waist (in) | Body hip (in) |
|---|---|---|---|---|
| 24 | 00 | XXS | 24.5 to 25.5 | 34 to 35.5 |
| 25 / 26 | 2 | XS | 25.5 to 27.5 | 34.5 to 36.5 |
| 27 | 4 | XS | 27.5 to 28.5 | 37 to 38.5 |
| 28 | 6 | S | 28.5 to 29.5 | 38 to 39.5 |
| 29 | 8 | S | 29.5 to 30.5 | 39 to 40.5 |
| 30 | 10 | M | 30.5 to 31.5 | 40 to 41.5 |
| 31 | 12 | M | 31.5 to 32.5 | 41 to 42.5 |
| 32 | 14 | L | 32.5 to 33.5 | 42 to 43.5 |
| 34 | 18 | XL | 34.5 to 36.5 | 44.5 to 46.5 |
Typical figures from one published chart, not a standard. Other brands will differ by an inch or a full size. Read the pattern, not the exact cell.
Why a size 28 isn't always a 28-inch waist
Look at the 28 row again: it is meant for a body waist of about 28.5 to 29.5 inches, so the number sits slightly under the tape-measure figure. That's mild. Across women's clothing the gap can be larger, because sizes drifted over the decades. The ASTM size 8 waist grew from about 23.5 inches in a 1958 standard to 29.5 inches in the 2011 version, and the US stopped treating standard sizes as official guidelines in 1983 (Wikipedia on vanity sizing). A 2003 study of over 1,000 pairs of women's pants found that more expensive brands tended to run larger than cheaper ones at the same nominal size (same source). So a "6" in one shop is not a "6" in the next.
Three things that move a size 28
- Stretch. A stretch denim can feel right a size smaller than a rigid one, because it gives. See stretch vs rigid denim.
- Rise. A high-rise 28 sits on a wider part of your torso than a low-rise 28, so it can feel tighter without being smaller. We cover that in what rise means.
- Hips. Waist-only labels say nothing about your hips or thighs. If a pair closes at the waist but pulls at the seat, the label was never the problem.
Use the chart in 4 steps
- Measure your waist where you wear your jeans, and your hips at the fullest point. (Our waist measuring guide has the detail.)
- Find both numbers on the chart. If they land on different rows, that is the usual reason sizes feel off. Pair waist and hip, not one alone.
- Open the brand's own garment measurements and compare them with a pair that already fits. That beats any conversion.
- Expect to land within a size, not on it.
When a chart stops helping
If your waist and hips sit on different rows, if you're between sizes, or if you're expecting, a label is guesswork. We don't sort you into a size. We cut each pair to your measurements: waist from 24" to 70", with the same price at every size. There are two ways to give us the numbers: copy your best-fitting jeans, measured flat, or measure your body. Height and weight are optional. Our team checks them within 1 working day and emails before cutting if anything looks unusual. Browse women's custom jeans from $109 (Flare, Wide Leg, Barrel and Maternity are $119), or see custom maternity jeans with a stretch belly panel. The measuring guides walk through both methods, and our Fit Guarantee covers your first pair in each fit: tell us within 30 days of delivery and we remake it free with corrected measurements, or refund up to $25 for a local alteration.
For why labels drift between shops, see why jeans sizes differ between brands.
Questions
What is a size 28 in women's jeans?
Usually a US 6, and some brands treat it as an 8. The 28 is a waist label for a body waist of roughly 28.5 to 29.5 inches on one published chart, but brands cut it differently.
Is a size 28 in jeans a small or a medium?
On the chart above it is a small (S), between an XS 27 and a medium 30. Letter sizes are even looser than numbers, so check the garment measurements.
Is a size 6 the same as a 28 in jeans?
Often, but not always. Several charts pair them, while at least one brand pairs 28 with an 8. If both numbers are on the tag, trust the waist and hip measurements printed beside them.
How do I convert my waist measurement to a jeans size?
Match your waist and your hips to a chart row, then compare with that brand's own garment measurements. On the chart above, a body waist is about an inch above the denim number.
Why do my jeans fit differently in the same size?
Brands cut to their own patterns, and stretch, rise and hip room all change how a number feels. Sizing has no enforced standard.