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Simple, breathable and beautifully soft. Shop our Pure Cotton underwear collection, everyday briefs and bikinis made from 100% cotton for all day comfort.
Shop Kayser Pure Cotton Underwear. Simple, breathable and beautifully soft everyday briefs, bikinis and boyleg styles made from 100% cotton. Cotton is the natural choice for everyday underwear as it breathes freely and stays gentle against skin. These are the basics you'll keep coming back to.
The Pure Cotton Underwear range includes full briefs for full coverage and all-day comfort, bikini briefs for a universally flattering everyday cut and boyleg styles that sit flat across the thigh with no ride-up under skirts and dresses. All styles are made from 100% cotton with a soft mesh trim, so you get the full benefit of natural breathability in every wear. Available in a range of sizes and classic everyday colours including black, white and nude.
Looking for an elevated cotton experience? Also explore the Supima Bliss collection, made from luxe Supima cotton.
Free AU delivery on orders over $75.*
Find your best fit.
Size Guide| Size | Hip | Waist |
|---|---|---|
| XS (8) | 92 - 97 | 59 - 64 |
| S (10) | 97 - 102 | 64 - 69 |
| M (12) | 102 - 107 | 69 - 74 |
| L (14) | 107 - 112 | 74 - 79 |
| XL (16) | 112 - 117 | 79 - 84 |
| 2XL (18) | 117 - 122 | 84 - 89 |
| 3XL (20) | 122 - 127 | 89 - 94 |
| 4XL (22) | 127 - 132 | 94 - 99 |
| Size | Hip | Waist |
|---|---|---|
| XS (8) | 36 - 38 | 23 - 25 |
| S (10) | 38 - 40 | 25 - 27 |
| M (12) | 40 - 42 | 27 - 29 |
| L (14) | 42 - 44 | 29 - 31 |
| XL (16) | 44 - 46 | 31 - 33 |
| 2XL (18) | 46 - 48 | 33 - 35 |
| 3XL (20) | 48 - 50 | 35 - 37 |
| 4XL (22) | 50 - 52 | 37 - 39 |
| Size | Hip | Waist | Underbust | Cup |
|---|---|---|---|---|
| XS (8) | 92 - 97 | 59 - 64 | 62 - 67 | AA - B |
| S (10) | 97 - 102 | 64 - 69 | 67 - 72 | A - C |
| M (12) | 102 - 107 | 69 - 74 | 72 - 77 | B - C |
| L (14) | 107 - 112 | 74 - 79 | 77 - 82 | B - D |
| XL (16) | 112 - 117 | 79 - 84 | 82 - 87 | C - D |
| Size | Hip | Waist | Underbust | Cup |
|---|---|---|---|---|
| XS (8) | 36 - 38 | 23 - 25 | 24 - 26 | AA - B |
| S (10) | 38 - 40 | 25 - 27 | 26 - 28 | A - C |
| M (12) | 40 - 42 | 27 - 29 | 28 - 30 | B - C |
| L (14) | 42 - 44 | 29 - 31 | 30 - 32 | B - D |
| XL (16) | 44 - 46 | 31 - 33 | 32 - 34 | C - D |
| UK/USA | 30 | 32 | 34 | 36 | 38 |
| AUS | 8 | 10 | 12 | 14 | 16 |
| Underbust Measurement (cm)Measure firmly around ribcage, directly underneath breasts. | |||||
|---|---|---|---|---|---|
| 62 - 67 | 67 - 72 | 72 - 77 | 77 - 82 | 82 - 87 | |
| Overbust Measurement (cm)Measure loosely around fullest part of bust. | |||||
| AA | 72 - 75 | 77 - 80 | 82 - 85 | 87 - 90 | 92 - 95 |
| A | 75 - 77 | 80 - 82 | 85 - 87 | 90 - 92 | 95 - 97 |
| B | 77 - 80 | 82 - 85 | 87 - 90 | 92 - 95 | 97 - 100 |
| C | 80 - 82 | 85 - 87 | 90 - 92 | 95 - 97 | 100 - 102 |
| D | 82 - 85 | 87 - 90 | 92 - 95 | 97 - 100 | 102 - 105 |
| DD | 85 - 87 | 90 - 92 | 95 - 97 | 100 - 102 | 105 - 107 |
| E | 92 - 95 | 97 - 100 | 102 - 105 | 107 - 110 | |
| F | 95 - 97 | 100 - 102 | 105 - 107 | 110 - 112 | |
| G | 102 - 105 | 107 - 110 | 112 - 115 | ||
| H | 105 - 107 | 110 - 112 | 115 - 117 | ||
| Underbust Measurement (in)Measure firmly around ribcage, directly underneath breasts. | |||||
|---|---|---|---|---|---|
| 24 - 26 | 26 - 28 | 28 - 30 | 30 - 32 | 32 - 34 | |
| Overbust Measurement (in)Measure loosely around fullest part of bust. | |||||
| AA | 28 - 29 | 30 - 31 | 32 - 33 | 34 - 35 | 36 - 37 |
| A | 29 - 30 | 31 - 32 | 33 - 34 | 35 - 36 | 37 - 38 |
| B | 30 - 31 | 32 - 33 | 34 - 35 | 36 - 37 | 38 - 39 |
| C | 31 - 32 | 33 - 34 | 35 - 36 | 37 - 38 | 39 - 40 |
| D | 32 - 33 | 34 - 35 | 36 - 37 | 38 - 39 | 40 - 41 |
| DD | 33 - 34 | 35 - 36 | 37 - 38 | 39 - 40 | 41 - 42 |
| E | 36 - 37 | 38 - 39 | 40 - 41 | 42 - 43 | |
| F | 37 - 38 | 39 - 40 | 41 - 42 | 43 - 44 | |
| G | 40 - 41 | 42 - 43 | 44 - 45 | ||
| H | 42 - 43 | 44 - 45 | 46 - 47 | ||