Name: Ray-Ban 4321CH Original Replacement Lenses
Brand: ReplacementLenses
SKU: 222
Availability: InStock

Ray-Ban 4321CH Original Replacement Lenses

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

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Original Ray-Ban RB4321CH replacement lenses

Bring your Ray-Ban RB4321CH sunglasses back to their original sharp, high-contrast sun performance without buying a new frame. These original Ray-Ban 4321CH replacement lenses are made for the Ray-Ban RB4321 in size 53, with free shipping and savings of up to 60% compared with purchasing a complete new pair.

Model compatibility

These Ray-Ban replacement lenses are designed for the Ray-Ban RB4321 / RB4321CH model in size 53. Because they are original Ray-Ban lenses, the shape, curve and fit are made to match the correct frame accurately when the size is right.

If you want original Ray-Ban lenses, this option keeps the look and optical character of your sunglasses, including the Chromance lens options listed for this model.

How to identify your model and size

Check the information printed inside the temple of your sunglasses before ordering. You should see RB4321 or RB4321CH, together with the lens size 53, usually shown as 53□ followed by the bridge and temple measurements.

The size 53 refers to the lens width in millimetres, not a diagonal measurement. If your frame does not show RB4321 or does not match size 53, do not force the lenses into the frame, as very small design differences can change the lens outline.

Main features

Brand: Ray-Ban.
Compatible model: RB4321 / RB4321CH.
Available size: 53.
Lens diameter: 58mm.
Lens material: polycarbonate.
Shape: square.
Lens curve: Base 6.
Use: sunglasses.
Wearer: adult.
Product type: original.
UV400 protection: blocks 100% of UVA/UVB rays.

Available lens options

5J – silver mirror Chromance polarized – plastic.
6O – green mirror silver Chromance polarized – plastic.
A1 – flash blue mirror Chromance polarized – plastic.
A2 – bronze flash Chromance – plastic.

Material, protection and lens finishes

These lenses are made from polycarbonate, a lightweight and impact-resistant material that helps preserve the comfortable balance of the RB4321CH frame. The Base 6 curve follows the optical geometry of the model and supports a precise fit in the correct frame.

The lens options marked as polarized feature Ray-Ban Chromance polarized performance, helping reduce glare and enhance contrast and colour perception outdoors. All listed options are sun lenses and include UV400 protection.

Why replace only the lenses

If your Ray-Ban RB4321CH frame is still in good condition, replacing only the lenses is the smart choice. You recover clarity, sun protection and the original look of your sunglasses while avoiding the cost of a complete new pair.

It is also a more sustainable decision: you keep a frame that already fits your face and reduce unnecessary waste. With advanced lens options such as Chromance, replacing both lenses helps maintain balanced colour, brightness and visual comfort.

Authenticity and logo

We are an official EssilorLuxottica distributor and our qualified opticians check lenses in our own workshop in Granada using a lensmeter. Original Ray-Ban lenses include the Ray-Ban logo and, on polarized variants, the Ray-Ban P marking.

Since 2018, we have handled more than 400,000 orders in over 50 countries and repaired more than 600,000 pairs of glasses. Your order is prepared carefully to help protect the lenses during shipping.

Frequently asked questions

Will these lenses fit any Ray-Ban RB4321 frame?

They are made for Ray-Ban RB4321 / RB4321CH in size 53. Always check the code inside the temple, because a similar-looking Ray-Ban frame may use a different lens shape.

Are these original Ray-Ban lenses?

Yes, these are original Ray-Ban replacement lenses. They include the Ray-Ban logo and the Ray-Ban P marking on the polarized lens options.

Can I install them at home?

Installation is possible for experienced users, but injected or plastic frames require controlled pressure. If you are not used to changing lenses, we recommend visiting an optical store or asking our opticians for guidance.

What if I choose the wrong size?

The wrong size may not seat properly or may feel loose in the frame. Confirm size 53 on your RB4321CH temple before placing the order.

Is it better than buying new sunglasses?

If your frame is still in good shape, replacing the lenses can save you up to 60% compared with buying a complete new pair. You keep the frame you already know and restore its optical performance.