Glasses for oval, heart and diamond faces
The usual stylist advice is to choose a frame that contrasts with your face. An oval face is balanced, so most shapes work and the choice is mostly taste. A heart face is wider at the forehead, so frames that are wider at the bottom or evenly rounded are suggested. A diamond face is widest at the cheekbones, so frames that add width at the brow are suggested. That is a styling convention, not a rule. Total frame width decides comfort, so check it first.
Oval faces
An oval face is a little longer than it is wide, with a gently rounded jaw. The FitMyFace shape guide lists square, rectangle, wayfarer, aviator, geometric, browline, round, oval and cat-eye frames as often suggested for it, and marks none as repeating the face shape. So choose by width, comfort and the look you want, and try one frame from outside your usual shape. Very large frames change the look a lot, so compare two or three sizes rather than only the biggest.
Heart faces
A heart face is wider at the forehead and narrows to the chin. Often suggested: oval, round, aviator and rectangle frames, whose lower edge is rounded or a little wider than the top. Cat-eye and browline frames add width at the brow, so the shape guide labels them as repeating a heart face. That is a bolder look some people choose on purpose. Frames with a light or thin top edge keep attention off a wide forehead.
Diamond faces
A diamond face is widest at the cheekbones, with a narrower forehead and jaw. Often suggested: oval, cat-eye, browline and round frames, because a browline or an upswept corner adds width at the brow. Geometric and rectangle frames repeat the angles of the cheekbones. Check that the frame is wide enough not to press on the cheekbones or temples.
Width matters more than shape
A frame of the "right" shape that is too narrow presses on your temples. One that is too wide slides down your nose. Compare the total front width in millimetres, not only the lens number printed on the arm. If you own a pair that fits, measure its frame width and use it as your target. The frame size guide explains the three numbers on the arm.
How the FitMyFace finder uses your face shape
After the scan, the finder shows the two face shapes your proportions match most, with a percentage for each, and you can tap another shape if it looks wrong. Frames from the often-suggested list for your shape get a bonus in the ranking, and frames that repeat your face shape are labelled. Width counts for more than shape, and a frame that fits your width is never hidden because of its shape. You can also filter the results by frame shape.
Face-shape labels are fuzzy, and the scan only estimates proportions and width from a photo. The on-face drawing is approximate and is not a substitute for an optician: let an optician confirm your prescription, pupillary distance and final fit. The ordinary glasses scan runs on your device. The optional AI previews (hair and glasses) send a photo to Cloudflare; your consent is the one "I agree" on the scan screen, and a switch on the results turns them off. FitMyFace is for adults 18 and over and is not available in Illinois.
Before purchase: check the current price, stock, lens options and returns on the store's own site. FitMyFace has no affiliate links and is not the seller.
Questions
Can an oval face wear any frame?
Most shapes are on the often-suggested list, but that does not make every frame fit. Width, bridge and how the frame sits on your nose still decide comfort.
What if the scan says my face is between two shapes?
That is common. The finder shows the two closest shapes and lets you tap another. Try one frame from each list on the same photo.
Are sunglasses the same?
The shape advice is the same. Sunglasses often run a little larger, so check the width just as carefully.