Quick answer
Measure your underbust and full bust with a soft tape for bra size, then measure your hips for panties. If you are between sizes, size up in bras and sets for comfort, but size down in g-string styles like the Kendall Panty Green. Always check the product's fit notes before ordering.
Kendall Panty Green
Buying lingerie online works best when you know your measurements and how each style is cut. This lingerie size guide walks you through measuring for bras, panties, and sets at home, then gives you clear decision rules for when to size up, size down, or switch styles entirely.
You do not need a professional fitting to get a comfortable fit. A soft measuring tape, a mirror, and a few minutes are enough. The key is to measure the same way each time and to treat sizing as a starting point, not a fixed number, because cuts like demi cups, high-waisted briefs, and g-strings all sit differently on the body.
How to measure for lingerie: bras, panties, and sets
Start with a soft measuring tape and wear a non-padded bra or no bra. For your bra size, measure your underbust snugly around your ribcage, then measure your full bust at the fullest point. The difference between those two numbers gives you a starting cup size. For panties, measure around the fullest part of your hips and compare that to the size chart. For sets, use your bra size as the anchor and match the panty to your hip measurement.
Write your measurements down and re-measure once to check for consistency. If you are between sizes, look at the product's fit notes and model information. For example, the Aubrey Set Stars notes that the studio model is an AU 10D / 8 and wears a M bra and S panty, which tells you the brand may cut bras and panties differently. That single detail can save you a return.
Aubrey Set Stars
- Measure over bare skin or a thin, non-padded bra, not over bulky clothing.
- Keep the tape level and snug, but not tight enough to compress your skin.
- Measure twice and average the numbers if they differ slightly.
Bra and panty sizing: what the numbers actually mean
Bra sizing combines band and cup. The band number should feel firm but not restrictive, and the cup should contain your breast tissue without gaping or spilling. Panty sizing is usually based on hip measurement, but the cut changes the fit. A g-string or thong sits differently from a boxer brief, so the same hip measurement can lead to different sizes across styles.
Sets add another layer because the bra and panty may be sized independently. If a set only lists one size, check whether it refers to the bra or the panty. When in doubt, choose the size that matches your larger measurement and adjust the straps or closures. The Hazel Set - Black, for example, has adjustable shoulder and back straps plus a hook and eye closure, which gives you some room to fine-tune the band.
- Band too tight? Size up in the band before changing cup size.
- Cup gaping? Try a smaller cup or a different cup shape like demi or full coverage.
- Panty riding up? Check the cut and consider sizing down in g-strings.
Lingerie size conversion and international sizing
Lingerie size conversion is one of the most confusing parts of shopping online. A US 34B is not the same as a UK 34B or an AU 12B, and panty sizes vary even more. Always use the brand's own size chart rather than a generic converter, because fit labels are not standardized across manufacturers.
If you know your size in one brand, treat it as a reference point, not a guarantee. Check the product page for model fit notes. The Kendall Panty Green lists two models: one is a 10D, AU 10 wearing a medium bra and small panties, and the other is a 10B, AU 8 wearing a small bra and small panties. That tells you the panty runs true to a small for both, while the bra size follows cup and band.
- Convert using the brand's chart, not a universal converter.
- Note your size in at least two systems (for example, US and AU) before ordering.
- When a product lists model sizes, use them as a real-world fit reference.
When to size up, size down, or switch styles
Sizing up is the safer choice for bras, corsets, and high-waisted styles where compression or digging in would be uncomfortable. Sizing down works better for g-strings and styles that are meant to sit snugly, like the Kendall Panty Green, which the brand recommends sizing down in. If you are consistently between sizes in one category, the issue may be the cut rather than the size.
Style changes can solve fit problems that sizing cannot. A demi cup like the Riley Bra White offers less coverage than a full-coverage style like the Hazel Set - Black. If you spill over a demi, a full-coverage or high-apex style may fit better without changing your measured size. Similarly, a boxer brief like the Lennox Underwear Black provides high-waisted support that a g-string cannot.
- Size up in bras and corsets if the band or waist feels restrictive.
- Size down in g-strings and thongs if they feel loose or ride up.
- Switch from demi to full coverage if you need more containment.
Decision rules for ordering lingerie online
- Between two bra band sizes: Choose the larger band if the smaller one leaves red marks or feels tight on the loosest hook. A band that fits on the loosest hook gives you room to tighten as the elastic relaxes.
- Between two panty sizes: Size down for g-strings and thongs, size up for briefs and high-waisted styles. The Kendall Panty Green is a g-string that the brand recommends sizing down in.
- Buying a set with one size label: Check whether the size refers to the bra or the panty, and use model fit notes to decide. The Aubrey Set Stars model wears a M bra and S panty, so the set may not be one uniform size.
- Unsure between demi and full coverage: Choose full coverage if you want more containment, demi if you prefer a lower neckline. The Riley Bra White is a demi cup, while the Hazel Set - Black offers full coverage.
Product facts that help with sizing
- Aubrey Set Stars: Fully adjustable bra top and thong with adjustable back straps and adjustable thong side straps. The studio model is an AU 10D / 8 and wears a M bra / S panty. The model wears different sizes in the bra and panty, so you may need to treat set sizing as two separate measurements rather than one.
- Kendall Panty Green: G-string cut with a cotton gusset and embroidery lace panelling lined with soft stretch mesh. The brand recommends sizing down in this style. If you are between sizes, choose the smaller size for a secure fit in this g-string.
- Riley Bra White: Low cut underwired demi-bra with adjustable back and shoulder straps and flower embroidery lace. A demi cup provides less coverage, so if you prefer more containment, consider a full-coverage style instead.
- Hazel Set - Black: Underwire bra with full coverage, adjustable shoulder and back straps, and hook and eye closure. Thong cut with stretch lace. The adjustable straps and hook-and-eye closure let you fine-tune the band, which helps if you are between band sizes.
Who this lingerie size guide is for
Best for
- First-time online lingerie shoppers who want a repeatable measuring method
- Anyone between sizes who needs clear rules for sizing up or down
- Shoppers comparing bra and panty sizes within a set
Not for
- Shoppers looking for a universal size chart that works across all brands
- Anyone who needs a professional in-person fitting for medical or post-surgery needs
Use your measurements as a starting point, then let the product's fit notes and adjustable features guide your final choice. When in doubt, size up in bras and sets for comfort, size down in g-strings for security, and switch styles if the cut, not the size, is the problem.
