Find your size
Wearing the wrong bra size is very common, in practice it’s almost never because your body is “hard to fit”, but because the sizing system is complex. The most common mistake is measuring too loosely under the bust, which gives too large a band number and too small a cup letter relative to your actual volume. The best way to know for sure is to re-measure yourself following the steps below, ideally while wearing a bra.
Step 1: Measure your band
Measure your ribcage just under the bust while wearing a bra. Write down the number, you’ll need it in step 3.
Step 2: Measure your bust (the cup)
Measure straight across your bust, at its fullest point. Write down this measurement too, you’ll need it in step 3.
Step 3: Use your measurements
Now that you’ve taken your underbust and bust measurements, there are two ways to find your correct bra size. You can use our size calculator, or check the traditional size chart below.
When using the size calculator, enter your two measurements in centimetres and we’ll suggest your bra size. Keep in mind that the result is a guide. For the best fit, it can help to also try the recommended sister sizes.
Step 1 table – Band (measured under the bust)
Underbust (cm) | Band size |
|---|---|
58–62 | 60 |
63–67 | 65 |
68–72 | 70 |
73–77 | 75 |
78–82 | 80 |
83–87 | 85 |
88–92 | 90 |
93–97 | 95 |
98–102 | 100 |
103–107 | 105 |
108–112 | 110 |
113–117 | 115 |
118–122 | 120 |
123–127 | 125 |
Step 2 table – Cup (measured over the fullest part of the bust; column headers are band sizes, cell values are the overbust measurement range in cm)
Cup | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
A | 72–74 | 77–79 | 82–84 | 87–89 | 92–94 | 97–99 | 102–104 | 107–109 | 112–114 | 117–119 | 122–124 | 127–129 | 132–134 | 137–139 |
B | 74–76 | 79–81 | 84–86 | 89–91 | 94–96 | 99–101 | 104–106 | 109–111 | 114–116 | 119–121 | 124–126 | 129–131 | 134–136 | 139–141 |
C | 76–78 | 81–83 | 86–88 | 91–93 | 96–98 | 101–103 | 106–108 | 111–113 | 116–118 | 121–123 | 126–128 | 131–133 | 136–138 | 141–143 |
D | 78–80 | 83–85 | 88–90 | 93–95 | 98–100 | 103–105 | 108–110 | 113–115 | 118–120 | 123–125 | 128–130 | 133–135 | 138–140 | 143–145 |
E | 80–82 | 85–87 | 90–92 | 95–97 | 100–102 | 105–107 | 110–112 | 115–117 | 120–122 | 125–127 | 130–132 | 135–137 | 140–142 | 145–147 |
F | 82–84 | 87–89 | 92–94 | 97–99 | 102–104 | 107–109 | 112–114 | 117–119 | 122–124 | 127–129 | 132–134 | 137–139 | 142–144 | 147–149 |
G | 84–86 | 89–91 | 94–96 | 99–101 | 104–106 | 109–111 | 114–116 | 119–121 | 124–126 | 129–131 | 134–136 | 139–141 | 144–146 | 149–151 |
H | 86–88 | 91–93 | 96–98 | 101–103 | 106–108 | 111–113 | 116–118 | 121–123 | 126–128 | 131–133 | 136–138 | 141–143 | 146–148 | 151–153 |
I | 88–90 | 93–95 | 98–100 | 103–105 | 108–110 | 113–115 | 118–120 | 123–125 | 128–130 | 133–135 | 138–140 | 143–145 | 148–150 | 153–155 |
J | 90–92 | 95–97 | 100–102 | 105–107 | 110–112 | 115–117 | 120–122 | 125–127 | 130–132 | 135–137 | 140–142 | 145–147 | 150–152 | 155–157 |
Updated on: 09/09/2026