Three numbers describe how a frame fits. Learn them once and every pair you buy afterwards - from us or anyone - is easier.
Hold a ruler flat across your face at eye level, temple to temple. Under 130 mm take the S, 130 to 140 mm the M, over 140 mm the L. That is it for most people. The rest of this page is for the edge cases.
Look inside the temple of any pair of glasses you own and you will usually find something like 52 □ 20 145. That is lens width, bridge width and temple length, all in millimetres. Ours are on every product page under “Measurements”.
| Number | What it measures | What it changes |
|---|---|---|
| Lens width | One lens, at its widest, edge to edge | How wide the whole frame is on your face. The number that picks your size. |
| Bridge | The gap between the two lenses, where the frame sits on your nose | Whether the frame sits high or low, and whether it slides. |
| Temple length | From the hinge to the tip of the arm | Whether the arm reaches behind your ear or stops short. |
Stand in front of a mirror with a ruler held flat against your face at the level of your eyes. Read the width where the ruler meets your temples - the flat bit beside each eye, not the ears. Ten seconds, one number.
| Face width at the temples | Our size | Standard shapes | Pilots & oversized |
|---|---|---|---|
| Under 130 mm | S | 48 mm lens | 52 / 55 mm lens |
| 130–140 mm | M | 52 mm lens | 55 / 58 mm lens |
| Over 140 mm | L | 55 mm lens | 58 / 61 mm lens |
Between sizes: go down for acetate, which sits closer and grips, and up for thin steel, which relies on nose pads and can slide if the frame is narrow. If you want sunglasses that cover a lot of face, go up regardless - that is what the oversized shelf is for.
Most of our acetate frames have a keyhole or saddle bridge that rests along the sides of the nose; the steel frames have adjustable silicone pads. Which suits you depends on where your nose starts.
Our standard temple is 140–145 mm, which reaches behind the ear on most heads. The sport wrap uses 125 mm straight temples on purpose, so they clear a helmet strap and grip the side of the head rather than hooking behind the ear. If a frame pinches behind the ears or slides forward when you look down, the temple angle is wrong, not the frame: an optician adjusts it in a minute, free, and so do we if you post it.
Two things change a fit after you buy. Acetate softens above about 60 °C - a parked car in July - and the temples open out, so the frame sits lower. Warm the temples gently with a hairdryer and press them in, or have an optician do it. Thin steel goes out of true if it is sat on; it bends back. Neither is covered by the guarantee because neither is a defect, but we will straighten and re-set any frame you post to us, at no charge, for as long as you own it.
| Frame | Lens width S / M / L | Bridge | Temple | Weight |
|---|---|---|---|---|
| Lido Square | 48 / 52 / 55 mm | 20 mm | 145 mm | 27 g |
| Riva Square, Bottle Green | 48 / 52 / 55 mm | 18 mm | 145 mm | 31 g |
| Molo Rectangular | 48 / 52 / 55 mm | 19 mm | 140 mm | 29 g |
| Scoglio Square, Tortoise | 48 / 52 / 55 mm | 21 mm | 145 mm | 28 g |
| Pontile Square, Lilac | 48 / 52 / 55 mm | 18 mm | 142 mm | 30 g |
| Tondo Round, Steel | 48 / 52 / 55 mm | 21 mm | 145 mm | 19 g |
| Sole Round, Gradient | 48 / 52 / 55 mm | 20 mm | 145 mm | 20 g |
| Faro Round, Tortoise | 48 / 52 / 55 mm | 22 mm | 145 mm | 34 g |
| Onda Round, Double Bridge | 48 / 52 / 55 mm | 19 mm | 145 mm | 23 g |
| Baia Oval, Steel | 48 / 52 / 55 mm | 20 mm | 142 mm | 18 g |
| Vela Pilot, Black Steel | 52 / 55 / 58 mm | 14 mm | 140 mm | 24 g |
| Scirocco Pilot, Mirror | 52 / 55 / 58 mm | 14 mm | 140 mm | 25 g |
| Maestrale Pilot, Gold | 52 / 55 / 58 mm | 14 mm | 140 mm | 23 g |
| Brezza Pilot, Colour Mirror | 52 / 55 / 58 mm | 14 mm | 140 mm | 22 g |
| Gatta Cat-eye, Black | 48 / 52 / 55 mm | 18 mm | 145 mm | 29 g |
| Luna Cat-eye, Rose | 48 / 52 / 55 mm | 19 mm | 145 mm | 28 g |
| Siesta Cat-eye, White | 48 / 52 / 55 mm | 18 mm | 142 mm | 27 g |
| Aurora Cat-eye, Tortoise | 48 / 52 / 55 mm | 19 mm | 145 mm | 32 g |
| Miele Narrow Cat-eye | 48 / 52 / 55 mm | 17 mm | 140 mm | 21 g |
| Grande Oversized, Brown | 55 / 58 / 61 mm | 16 mm | 140 mm | 36 g |
| Ombra Oversized, Red | 55 / 58 / 61 mm | 16 mm | 140 mm | 35 g |
| Marea Oversized, Tortoise | 55 / 58 / 61 mm | 17 mm | 142 mm | 37 g |
| Isola Oversized, Steel | 55 / 58 / 61 mm | 15 mm | 142 mm | 26 g |
| Scatto Sport Wrap | 60 / 63 / 66 mm | 15 mm | 125 mm | 24 g |
| Cresta Half-rim | 52 / 55 / 58 mm | 17 mm | 138 mm | 20 g |
Email hello@shadeandsiesta.com with your face width and the three numbers from inside a pair you already like. We reply with a size and a shape, not a shrug.