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Original Ray-Ban RB3681 Replacement Lenses

Price range: $15.99 through $38.99

Size chart

Clothing Size Conversion Chart
Category	US	EU	UK	Chest (in)	Waist (in)	Hips (in)
Men	XS	44	34	32-34	26-28	33-35
	S	46	36	34-36	28-30	35-37
	M	48	38	38-40	32-34	39-41
	L	50	40	42-44	36-38	43-45
	XL	52	42	46-48	40-42	47-49
Women	XS	32	6	31-32	24-25	33-34
	S	34	8	33-34	26-27	35-36
	M	36	10	35-36	28-29	37-38
	L	38-40	12-14	37-39	30-32	39-41
	XL	42	16	40-42	33-35	42-44
Youth	XS	128	7	26-28	23-24	26-28
	S	134	8	28-30	24-25	28-30
	M	140	10	30-32	25-26	30-32
	L	146	12	32-34	26-27	32-34
	XL	152	14	34-36	27-28	34-36

Pants Size Conversion Chart
Category	US	EU	UK	Waist (in)	Hip (in)	Inseam (in)
Men	28	44	28	28	34	30
	30	46	30	30	36	31
	32	48	32	32	38	32
	34	50	34	34	40	33
	36	52	36	36	42	34
Women	0	32	4	24	34	30
	2	34	6	25	35	30
	4	36	8	26	36	31
	6	38	10	27	38	32
	8	40	12	28	40	32

Shoes Size Conversion Chart
Category	US	EU	UK	Foot Length (in)
Men	6	39	5.5	9.25
	7	40	6.5	9.625
	8	41	7.5	10
	9	42	8.5	10.25
	10	43	9.5	10.625
	11	44	10.5	11
	12	45	11.5	11.25
	13	46	12.5	11.625
Women	5	35	2.5	8.5
	6	36	3.5	8.875
	7	37	4.5	9.25
	8	38	5.5	9.625
	9	39	6.5	10
	10	40	7.5	10.25
	11	41	8.5	10.625
	12	42	9.5	11
M (Unisex)	5	37	4.5	8.75
	6	38	5.5	9
	7	39	6.5	9.5
	8	40	7.5	10
	9	41	8.5	10.25
	10	42	9.5	10.625
	11	43	10.5	11
	12	44	11.5	11.25

color

13 - BROWN GRADIENT - PLASTIC

71 - GREEN - PLASTIC

80 - DARK BLUE - PLASTIC

Q1 - PHOTOCHROMATIC YELLOW GRADIENT GREEN - PLASTIC

Q4 - PHOTOCHROMATIC BROWN GRADIENT DARK BROWN - PLASTIC

Q5 - PHOTOCHROMATIC GREEN GRADIENT BLUE - PLASTIC

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Description
Additional information

Description

Original Ray-Ban RB3681 replacement lenses

If your Ray-Ban RB3681 frame still fits perfectly but the lenses are scratched, worn or damaged, replacing only the lenses is the smart way to refresh your sunglasses without buying a new pair. These original Ray-Ban RB3681 lenses keep the look, protection and fit of the model, with free shipping and savings of up to 60% compared with new sunglasses.

At ReplacementLenses.net we work every day with original Ray-Ban lenses. We are an official EssilorLuxottica distributor, with our own optical workshop in Granada and qualified opticians checking every lens.

Model compatibility

These Ray-Ban replacement lenses are made for the Ray-Ban RB3681 in size 50. They are not universal lenses for any round or Phantos-style Ray-Ban frame; the shape, diameter, Base 6 curve and metal-rim fit are specific to this model.

We recommend fitting them only to an original Ray-Ban frame. Replica frames can have small differences in the rim that prevent the lens from seating correctly.

How to identify your model and size

Look inside the temple arm of your sunglasses. You should find the model reference RB3681 and the lens size 50 printed or engraved on the frame.

Ray-Ban frame codes usually show the model first, then frame colour information and measurements. For this purchase, the key checks are RB3681 and 50. On a metal frame, choosing the wrong size can leave the lens loose or under pressure.

Main features

Brand: Ray-Ban
Compatible model: RB3681
Size: 50
Product type: original
Lens material: polycarbonate
Diameter: 53 mm
Shape: Phantos
Lens curve: Base 6
Use: sunglasses
Audience: adult
Compatible temple material: metal

Available colours

13 – Brown gradient – plastic
71 – Green – plastic
80 – Dark blue – plastic
Q4 – Photochromic brown gradient dark brown – plastic
Q5 – Photochromic green gradient blue – plastic
Q1 – Photochromic yellow gradient green – plastic

Material, protection and lens options

These Ray-Ban RB3681 lenses are made from polycarbonate, a lightweight material suited to everyday sunglasses. The Base 6 curve follows the optical geometry of the model and helps preserve the original wearing experience.

They provide UV400 protection, blocking 100% of UVA and UVB rays. If you are looking for polarised lenses, choose only a lens option explicitly marked as polarised; the options listed here are not described as polarised.

Why replace only the lenses

The metal RB3681 frame is durable and often remains in excellent condition long after the lenses have been scratched. Replacing only the lenses lets you keep the premium frame you already like, reduce waste and bring your sunglasses back to life at a fraction of the cost.

Authenticity and Ray-Ban logo

Because these are original Ray-Ban lenses, they include the Ray-Ban logo. This is one of the key differences between genuine lenses and generic compatible alternatives.

As an official EssilorLuxottica distributor, we supply genuine parts and check lenses in our Granada workshop using a lensmeter. Since 2018, we have repaired more than 600,000 glasses and shipped over 400,000 orders to more than 50 countries.

Frequently asked questions

Are these lenses compatible with any round Ray-Ban frame?

No. They are specifically made for Ray-Ban RB3681 size 50. Similar-looking frames may have a different rim shape, curve or diameter.

How do I know if my frame is size 50?

Check the inside of the temple arm for RB3681 and the number 50. If your frame shows a different size, this replacement lens version is not the correct one.

Are the lenses glass?

No. The material specified for this product is polycarbonate. It is light and practical for adult sunglasses.

Do they provide UV protection?

Yes. These original Ray-Ban lenses provide UV400 protection, blocking 100% of UVA and UVB rays.

Can I install them at home?

The RB3681 is a metal frame, so the lens is normally changed by carefully loosening the rim screw. Do not force the lens or bend the bridge; if you are unsure, ask an optician.

Do they have the Ray-Ban logo?

Yes. Original Ray-Ban lenses include the Ray-Ban logo, keeping the authentic look of your RB3681 sunglasses.

Additional information

color	13 – BROWN GRADIENT – PLASTIC , 71 – GREEN – PLASTIC , 80 – DARK BLUE – PLASTIC , Q1 – PHOTOCHROMATIC YELLOW GRADIENT GREEN – PLASTIC , Q4 – PHOTOCHROMATIC BROWN GRADIENT DARK BROWN – PLASTIC , Q5 – PHOTOCHROMATIC GREEN GRADIENT BLUE – PLASTIC
Size	50