Client care
Size guide
How to measure, and the size to choose for every piece we sell. Each product page shows the sizes that piece comes in.
Women's clothing
Our sizes are cut closer to the body than most UK high-street sizes, so choose by your measurements rather than your usual letter. The UK size beside each one is a guide.
How to measure
- Bust
- Around the fullest part of your bust, with the tape level across your back.
- Waist
- Around your natural waist, the narrowest part of your torso, keeping one finger under the tape.
- Hips
- Around the fullest part of your hips, with your feet together.
| Size | UK | Bust | Waist | Hips |
|---|---|---|---|---|
| XS | 4 to 6 | 80 to 84 | 62 to 66 | 86 to 90 |
| S | 6 to 8 | 84 to 88 | 66 to 70 | 90 to 94 |
| M | 8 to 10 | 88 to 92 | 70 to 74 | 94 to 98 |
| L | 10 to 12 | 92 to 96 | 74 to 78 | 98 to 102 |
| XL | 12 to 14 | 96 to 100 | 78 to 82 | 102 to 106 |
| XXL | 14 to 16 | 100 to 104 | 82 to 86 | 106 to 110 |
| XXXL | 16 to 18 | 104 to 108 | 86 to 90 | 110 to 114 |
| Size | Bust | Waist | Hips |
|---|---|---|---|
| XS | 31.5 to 33.1 | 24.4 to 26 | 33.9 to 35.4 |
| S | 33.1 to 34.6 | 26 to 27.6 | 35.4 to 37 |
| M | 34.6 to 36.2 | 27.6 to 29.1 | 37 to 38.6 |
| L | 36.2 to 37.8 | 29.1 to 30.7 | 38.6 to 40.2 |
| XL | 37.8 to 39.4 | 30.7 to 32.3 | 40.2 to 41.7 |
| XXL | 39.4 to 40.9 | 32.3 to 33.9 | 41.7 to 43.3 |
| XXXL | 40.9 to 42.5 | 33.9 to 35.4 | 43.3 to 44.9 |
Finding your fit
- Between two sizes? Choose the larger one for comfort, or the smaller one if you like a close, fitted line.
- For fitted dresses and tailoring, your largest measurement decides the size.
- Where a piece's own measurements are listed in its product details, compare them with a similar piece you already own.
- Not sure which to choose? Email support@shopthiva.com with your measurements and the piece you like, and we will tell you which size to order.
Men's clothing
Our sizes are cut slimmer than most UK high-street sizes, so choose by your chest and waist rather than your usual letter. The UK jacket size is the chest in inches.
How to measure
- Chest
- Around the fullest part of your chest, under your arms, with the tape level across your shoulder blades.
- Waist
- Around your waist where you wear your trousers, keeping one finger under the tape.
- Inside leg
- From the top of your inner thigh to the floor, standing straight without shoes.
| Size | UK jacket | Chest (cm) | Chest (in) | Waist (cm) | Waist (in) |
|---|---|---|---|---|---|
| XXS | 32 | 80 to 84 | 31.5 to 33.1 | 64 to 68 | 25.2 to 26.8 |
| XS | 34 | 84 to 88 | 33.1 to 34.6 | 68 to 72 | 26.8 to 28.3 |
| S | 35 | 88 to 92 | 34.6 to 36.2 | 72 to 76 | 28.3 to 29.9 |
| M | 37 | 92 to 96 | 36.2 to 37.8 | 76 to 80 | 29.9 to 31.5 |
| L | 39 | 96 to 100 | 37.8 to 39.4 | 80 to 84 | 31.5 to 33.1 |
| XL | 40 | 100 to 104 | 39.4 to 40.9 | 84 to 88 | 33.1 to 34.6 |
| XXL | 42 | 104 to 108 | 40.9 to 42.5 | 88 to 92 | 34.6 to 36.2 |
| XXXL | 43 | 108 to 112 | 42.5 to 44.1 | 92 to 96 | 36.2 to 37.8 |
| 4XL | 45 | 112 to 116 | 44.1 to 45.7 | 96 to 100 | 37.8 to 39.4 |
| 5XL | 46 | 116 to 120 | 45.7 to 47.2 | 100 to 104 | 39.4 to 40.9 |
| 6XL | 48 | 120 to 124 | 47.2 to 48.8 | 104 to 108 | 40.9 to 42.5 |
| 7XL | 50 | 124 to 128 | 48.8 to 50.4 | 108 to 112 | 42.5 to 44.1 |
Finding your fit
- Between two sizes? Choose the larger one: a jacket can be taken in, but not let out.
- Suits are sold as a set in one size, so choose by the larger of your chest and waist.
- Where a piece's own measurements are listed in its product details, compare them with a jacket or trousers you already own.
- Not sure which to choose? Email support@shopthiva.com with your measurements and the piece you like, and we will tell you which size to order.
Women's shoes
Our shoes are sized in EU sizes. Measure your foot, then choose the size whose foot length matches yours or is just longer.
How to measure
- Foot length
- Stand on a sheet of paper with your heel against a wall, mark the tip of your longest toe, and measure from the wall to the mark. Measure both feet in the evening and use the longer one.
| EU | UK | US | Foot length (cm) | Foot length (in) |
|---|---|---|---|---|
| 34 | 2 | 4 | 22.0 | 8.7 |
| 35 | 2.5 | 4.5 | 22.5 | 8.9 |
| 36 | 3.5 | 5.5 | 23.0 | 9.1 |
| 37 | 4 | 6 | 23.5 | 9.3 |
| 38 | 5 | 7 | 24.0 | 9.4 |
| 39 | 6 | 8 | 24.5 | 9.6 |
| 40 | 6.5 | 8.5 | 25.0 | 9.8 |
| 41 | 7.5 | 9.5 | 25.5 | 10 |
| 42 | 8 | 10 | 26.0 | 10.2 |
| 43 | 9 | 11 | 26.5 | 10.4 |
Finding your fit
- Pointed and closed heels feel shorter than sandals; if you are between sizes or have a wide foot, choose the larger.
- Returns are free for 30 days on unworn shoes in their box, so you can try them at home.
- Not sure which to choose? Email support@shopthiva.com with your measurements and the piece you like, and we will tell you which size to order.
Men's shoes
Our shoes are sized in EU sizes. Measure your foot, then choose the size whose foot length matches yours or is just longer.
How to measure
- Foot length
- Stand on a sheet of paper with your heel against a wall, mark the tip of your longest toe, and measure from the wall to the mark. Measure both feet in the evening and use the longer one.
| EU | UK | US | Foot length (cm) | Foot length (in) |
|---|---|---|---|---|
| 38 | 5 | 6 | 24.0 | 9.4 |
| 39 | 6 | 7 | 24.5 | 9.6 |
| 40 | 6.5 | 7.5 | 25.0 | 9.8 |
| 41 | 7.5 | 8.5 | 25.5 | 10 |
| 42 | 8 | 9 | 26.0 | 10.2 |
| 43 | 9 | 10 | 26.5 | 10.4 |
| 44 | 9.5 | 10.5 | 27.0 | 10.6 |
| 45 | 10.5 | 11.5 | 27.5 | 10.8 |
| 46 | 11 | 12 | 28.0 | 11 |
| 47 | 12 | 13 | 28.5 | 11.2 |
Finding your fit
- Loafers and Oxfords should feel snug at first and ease with wear; if you are between sizes, choose the larger.
- Returns are free for 30 days on unworn shoes in their box, so you can try them at home.
- Not sure which to choose? Email support@shopthiva.com with your measurements and the piece you like, and we will tell you which size to order.
Rings
Our rings are sized in US sizes. Find yours from the inside diameter of a ring you already wear, or from the circumference of your finger.
How to measure
- With a ring you own
- Lay it flat on a ruler and measure straight across the inside, edge to edge, in millimetres. That is the inside diameter.
- With your finger
- Wrap a strip of paper around the base of your finger, mark where it meets, and measure the length in millimetres. That is the circumference.
| US | UK | Inside diameter (mm) | Circumference (mm) |
|---|---|---|---|
| 4 | H½ | 14.9 | 46.8 |
| 5 | J½ | 15.7 | 49.3 |
| 6 | L½ | 16.5 | 51.9 |
| 7 | N½ | 17.3 | 54.4 |
| 8 | P½ | 18.1 | 57.0 |
| 9 | R½ | 18.9 | 59.5 |
| 10 | T½ | 19.8 | 62.1 |
| 11 | V½ | 20.6 | 64.6 |
| 12 | Y | 21.4 | 67.2 |
| 13 | Z+1 | 22.2 | 69.7 |
Finding your fit
- Fingers are larger in the evening and in warm weather; measure then for a ring that never pinches.
- Wide bands sit tighter than fine ones. For a band wider than 6mm, choose half a size up.
- Between two sizes? Choose the larger one: it must pass over the knuckle.
- Not sure which to choose? Email support@shopthiva.com with your measurements and the piece you like, and we will tell you which size to order.
Necklaces
Each chain's length is listed in its product details. This guide shows where each length sits, so you can picture it before it arrives.
How to measure
- With a necklace you own
- Lay it straight on a table, clasp to clasp, and measure the length. Choose the length that sat where you liked it.
- With a piece of string
- Hang a string around your neck to where you want the chain to fall, then measure the string.
| Length (cm) | Length (in) | Name | Where it sits |
|---|---|---|---|
| 35 to 40 | 14 to 16 | Choker | Sits close around the base of the neck. |
| 40 to 45 | 16 to 18 | Princess | Rests on the collarbone; the most worn length, ideal with open necklines. |
| 45 to 50 | 18 to 20 | Below the collarbone | Falls just under the collarbone; lovely with crew necks and layered under a shorter chain. |
| 50 to 60 | 20 to 24 | Matinée | Rests on the top of the bust; made for high necks and knitwear. |
| 60 to 80 | 24 to 31 | Opera | Falls to the bust or below; worn long or doubled. |
Finding your fit
- A chain sits a little shorter on a larger neck or a fuller bust, so allow an extra 2 to 5cm.
- To layer, choose chains about 5cm apart, such as 40cm with 45cm, so each one shows.
- An extension chain, where a piece has one, lets you wear it at more than one length.
- Not sure which to choose? Email support@shopthiva.com with your measurements and the piece you like, and we will tell you which size to order.
Bracelets
Each piece's length is listed in its product details. Measure your wrist, then add 1 to 3cm for the way you like it to sit.
How to measure
- Wrist
- Wrap a soft tape or a strip of paper around your wrist just below the wrist bone, where the piece will sit, and measure where it meets.
| Your wrist | Piece length | Size |
|---|---|---|
| 13 to 14 | 15 to 16 | Slim |
| 14 to 16 | 16 to 18 | Average |
| 16 to 18 | 18 to 20 | Larger |
| 18 to 20 | 20 to 22 | Larger still |
Finding your fit
- For a close fit add 1cm to your wrist measurement; for a fit that moves add 2 to 3cm.
- Bangles and cuffs have no clasp, so they must pass over your hand: measure around your knuckles with your fingers together.
- Not sure which to choose? Email support@shopthiva.com with your measurements and the piece you like, and we will tell you which size to order.
Anklets
Each piece's length is listed in its product details. Measure your ankle, then add 1 to 3cm for the way you like it to sit.
How to measure
- Ankle
- Wrap a soft tape or a strip of paper around your ankle just above the ankle bone, where the piece will sit, and measure where it meets.
| Your ankle | Piece length | Size |
|---|---|---|
| 19 to 20 | 21 to 22 | Slim |
| 20 to 22 | 22 to 24 | Average |
| 22 to 24 | 24 to 26 | Larger |
| 24 to 26 | 26 to 28 | Larger still |
Finding your fit
- For a close fit add 1cm to your ankle measurement; for a fit that moves add 2 to 3cm.
- Anklets with an extension chain fit a wide range of ankles; the extension is listed in the details.
- Not sure which to choose? Email support@shopthiva.com with your measurements and the piece you like, and we will tell you which size to order.
Waist chains
Each chain's length is listed in its product details. Measure where you will wear it, on the waist or lower on the hips, and choose a chain at least that long.
How to measure
- Where you will wear it
- Wrap a soft tape around your waist or hips at the height the chain will sit, keeping it level, and note the measurement.
| Chain length | Fits a measurement of | Worn |
|---|---|---|
| 70 to 80 | 65 to 75 | At the natural waist |
| 80 to 90 | 75 to 85 | Waist or high hips |
| 90 to 110 | 85 to 105 | Low on the hips |
Finding your fit
- The extension chain lets the piece sit higher or lower; the loose end hangs as a drop.
- Worn over a dress or a high-waisted skirt it needs a few centimetres more than on bare skin.
- Not sure which to choose? Email support@shopthiva.com with your measurements and the piece you like, and we will tell you which size to order.
Not sure which size to choose? Contact us with your measurements and the piece you like, and we will tell you which size to order. Returns are free within 30 days.