Pantos Glasses Explained: The Shape Between Round and Square

Pantos glasses are frames with a rounded lens that has a slightly flattened top and a fuller, softer bottom, a little like a keyhole or a tipped-over teardrop. They sit between a perfect circle and a square: softer than angular frames, more structured than true round ones. That balance is why pantos frames suit many face shapes and look at home in both an office and a weekend outfit.

What makes a frame "pantos"?

The name is used loosely, so it helps to know the features that define the shape. A pantos lens is never a perfect circle. Look for these details:

• A flatter top line that runs close to the brow, so the frame reads as straighter across the eyes.
• A rounded, slightly wider lower half, which gives the lens its soft "P" or keyhole outline.
• A raised or keyhole bridge on many acetate versions, which lifts the frame and opens up the centre of the face.
• Visible corners at the hinges, often with small studs or rivets on the front.

Our Concord frame is a good reference point. It is a full-rim acetate frame with a keyhole nose bridge and stud accents on the front, and a lens 50 mm wide and 44 mm tall. That near-square ratio of width to height is what gives it the pantos look rather than a wide oval or a pure circle.

Pantos vs round vs square: how they compare

If you are deciding between shapes, this side-by-side view shows where pantos lands.

Feature	Round	Pantos	Square
Top line	Fully curved	Gently flattened	Straight
Overall feel	Soft, artistic	Balanced, classic	Bold, defined
Works best on	Square and angular faces	Oval, square, heart and many long faces	Round and oval faces
Lens depth	Varies	Usually medium to deep	Often shallower
Dress code	Creative, casual	Office to weekend	Smart, modern

In short, pantos is the "middle option". If round frames feel too playful on you and square frames feel too severe, this is the shape to try next. You can browse the wider families in our round frames and square frames collections to see the difference in person.

Who suits pantos glasses?

Because the shape mixes a straight top with a curved base, it adds a bit of contrast to most faces without fighting their natural lines.

• Oval faces can wear almost any pantos size; just keep the frame about as wide as your face at the temples.
• Square faces benefit from the curved lower rim, which softens a firm jaw.
• Heart-shaped faces get a little visual weight at the bottom of the lens, balancing a wider forehead.
• Long faces often look good in a deeper pantos lens, since the extra height fills the space between brow and cheek.
• Round faces can wear pantos too, but choose a version with clear corners at the hinges and a flatter top so the frame does not echo the face too closely.

Not sure which group you fall into? Our frames and face shapes guide walks you through it in a couple of minutes.

Getting the size right

Pantos frames depend on proportion. A pair that is too small looks fussy; one that is too wide loses the neat, balanced character of the shape. Three numbers matter most:

1. Frame width. The front should be close to the width of your face at the temples. Concord's 142 mm front is a medium width that fits many adults.
2. Bridge width. With a keyhole bridge, the frame rests on the sides of the nose rather than the top. Concord's 22 mm bridge is a common middle size.
3. Lens height. A deeper lens, such as Concord's 44 mm, gives more room for progressive lenses and makes the pantos curve more visible.

Compare these numbers with a pair you already like. Our frame size measurement guide shows where each figure is printed and how to measure at home.

Colours and materials that suit the shape

Pantos is traditionally an acetate shape, because thicker material shows off the soft curves and the keyhole bridge. Some quick colour pointers:

• Tortoiseshell is the classic choice. It looks warm and slightly academic, and it hides the frame's thickness well. See our tortoise frames.
• Transparent tones such as tea brown or grey keep the shape light, which helps if you have fine features or want a quieter look.
• Black sharpens the flat top line and makes the frame read more like a square, a good option for a more formal style.

For more options in this material, browse the full acetate collection.

Pantos sunglasses

The same shape works well as sunglasses. A deep pantos lens covers more of the eye area than a narrow rectangle, and the rounded base keeps it from looking heavy. Our Concord sunglasses use the same silhouette with polarized UV400 lenses, according to the product details. Pick a darker tint such as grey or brown for bright days, and match the frame colour to the eyeglasses you already wear if you want a coordinated pair.

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Frequently asked questions

Is pantos the same as round?

No. Round frames are close to a full circle, while pantos lenses have a flatter top and a fuller base. Many shops group them together, which is why you may find pantos styles in round collections.

Can I get progressive lenses in pantos frames?

Usually yes, as long as the lens is deep enough. Frames around 44 mm tall, like Concord, give more vertical room than shallow rectangles. Choose your lens type in our lens selector when you order.

Are pantos glasses for men or women?

Both. The shape is considered unisex, and Concord is styled for men and women alike. Colour and size have more effect on the final look than gender.

What is a keyhole bridge?

It is a bridge cut in an upside-down U shape, so the frame rests on the sides of the nose. It is a common detail on pantos acetate frames and gives the front a vintage look.

Find your pantos pair

If you like the idea of round glasses but want a little more structure, pantos is an easy shape to live with every day. Start with the classic Concord in tortoise, or explore more styles in our eyeglasses collection. Add your prescription in a few clicks with our lens selector.