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The Ray-Ban RB4305 sunglasses bring retro style back to the streets with a phantos frame shape that works for just about anyone. These unisex frames feature a distinctive key bridge—a vintage detail that sets them apart from standard round frames—and full-rim acetate construction that's both lightweight and durable.
Frame Design and Materials
Built from nylon and propionate acetate, the RB4305 balances strength with all-day comfort. The phantos shape (a softened round silhouette) flatters square, oval, and heart-shaped faces by adding curves where angular features need balance. At 53mm lens width, 19mm bridge, and 145mm temples, the fit runs true to a medium size. The frame comes in eight color options, from classic black and tortoise havana to striped red havana and gradient lens combinations.
The key bridge isn't just for looks—it distributes weight more evenly across the nose, which customers mention helps during longer wear. Ray-Ban's signature logo sits on both temples, and the frames ship with a protective case and cleaning cloth.
Lenses and UV Protection
Standard lenses provide 100% UVA and UVB protection. Polarized options are available in select colorways (look for the "/9A" or "/83" codes in the variant name), cutting glare for driving and water activities. Gradient lenses offer a darker tint at the top that fades toward the bottom—practical for shifting between bright sun and shade.
Prescription-Ready
The RB4305 accepts prescription lenses, including single vision, progressive, and bifocal options. The full-rim design holds thicker Rx lenses securely, and the frame depth accommodates most prescriptions without the lenses protruding past the frame edge.
Product Details
Product DetailsModel
0RB4305Shape
Gender
Material
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsFrame Color
BlackColor Code
601/71Color Description
BlackLens Color
Green
Color Code
820/73Color Description
RedLens Color
Dark Brown
Frame Color
TortoiseColor Code
710/73Color Description
HavanaLens Color
Dark Brown
Frame Color
BrownColor Code
616613Color Description
Light BrownLens Color
Brown Gradient Dark Brown
Frame Color
TortoiseColor Code
710/83Color Description
HavanaLens Color
Polar Brown
Frame Color
BlackColor Code
601/9AColor Description
BlackLens Color
Polar Green
Frame Color
TortoiseColor Code
643280Color Description
Striped Blue HavanaLens Color
Dark Blue
Frame Color
TortoiseColor Code
643087Color Description
Striped Grey HavanaLens Color
Dark Grey
Size Details
Size DetailsSize
5319-145
Size
5319-145
Size
5319-145
Size
5319-145
Size
5319-145
Size
5319-145
Bridge Width
19.00Temple Length
145.00Size
5319-145
Bridge Width
19.00Temple Length
145.00Size
5319-145
My spouse got her prescription sunglasses from Designer Optics. Her biggest issue was poor communication, which may have been released to our use of a shared paypal account for her order, but the glasses themselves were well done!
I had tried a pair of Ray ban at my eye doctors and they want a lot for just single vision lenses for prescription sun glasses. My regular go to - Costco doesn’t carry this particular model. I found design optics and decided to give it a shot. I am very happy with the quality, customer service and price. Delivered about 1 week’s time too.
I just have to measure the distance b/w the two pupils. All is good and smooth. Would recommend.
I love the style and gradient lens. The perfect sunglasses for me. 😊
It came out pretty good, i wish there was an option for just the frame for i had sunglasses before and reused the lens. Thank you
It was very fast and easy. Thanks !!!
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Frequently Asked Questions
Are Ray-Ban 4305 sunglasses prescription-ready?
Yes, the Ray-Ban RB4305 frames are fully prescription-ready. The full-rim acetate construction can accommodate single vision, progressive, and bifocal prescription lenses. You can add your prescription during checkout and choose from plastic, polycarbonate, or other lens materials based on your needs.
What face shapes do Ray-Ban 4305 sunglasses fit best?
The Ray-Ban 4305's phantos (rounded) shape works best on square, oval, and heart-shaped faces. The soft curves of the phantos frame add balance to angular features. The 53mm lens width and 19mm bridge provide a medium fit suitable for average-sized heads.
What is the key bridge on the Ray-Ban 4305?
The key bridge is a vintage design detail where the bridge has a distinctive keyhole shape rather than a standard straight bridge. This retro styling element adds visual interest and can provide a more comfortable fit by distributing weight differently across the nose. It's one of the signature features that distinguishes the RB4305 from other round Ray-Ban frames.
Do Ray-Ban 4305 sunglasses come with polarized lenses?
Polarized lenses are available on select Ray-Ban 4305 variants. Look for color codes ending in "/9A" (polarized green) or "/83" (polarized brown) in the variant name. Polarized lenses reduce glare from reflective surfaces like water, snow, and pavement, making them ideal for driving and outdoor activities.
What is the difference between Ray-Ban 4305 and 4306?
The Ray-Ban 4305 features a phantos (rounded) shape, while the 4306 has a hexagonal frame shape. Both share similar acetate construction, key bridge styling, and size ranges, but the 4306 offers a more angular, geometric look. The choice comes down to whether you prefer soft curves (4305) or defined angles (4306).
What materials are Ray-Ban 4305 frames made from?
The Ray-Ban RB4305 frames are made from lightweight nylon and propionate acetate. These materials provide durability and flexibility while keeping the frames comfortable for all-day wear. The acetate construction allows for rich color patterns like tortoise shell and striped finishes that you see in the various color options.
Compare With Similar Frames
How the Ray-Ban 4305 Sunglasses stacks up against the closest alternatives we carry.
- Hexagonal shape offers a more geometric, modern look
- Same key bridge and acetate construction as the 4305
- Works well for round and oval faces that need more angles
- Larger 54mm lens provides more coverage and a bolder look
- Oversized round shape is very on-trend
- Rubberized frame finish offers a unique matte texture
Read the full comparison
Ray-Ban 4305 vs. 4306: Phantos or Hexagonal?
The Ray-Ban 4305 and 4306 are sister models that share nearly identical construction—same acetate materials, same vintage key bridge, same 53mm size—but differ in frame shape. The 4305 features a phantos (softly rounded) silhouette that's universally flattering and leans retro. The 4306 swaps that curve for a hexagonal shape with defined angles, giving it a more contemporary, geometric vibe.
If you have a square or angular face, the 4305's curves will balance your features better. Round or oval faces can go either way, but the 4306's angles add definition. Both accept prescriptions and come in polarized options. It's purely a style call: soft vintage (4305) or sharp modern (4306).
Ray-Ban 4305 vs. Erika 4171: Vintage Key Bridge or Oversized Round?
The Erika 4171 is Ray-Ban's oversized round icon, and it's a natural comparison if you're drawn to round frames. The key difference is size and styling: the Erika runs larger (54mm lens) with a rubberized matte finish and no key bridge, while the 4305 is a bit more compact (53mm) with a polished acetate finish and that distinctive keyhole bridge.
The Erika makes a bolder statement and offers more sun coverage, but it can overwhelm smaller faces. The 4305 is more versatile across face sizes and has that vintage detail that sets it apart. Both are prescription-ready and available with polarized lenses. Choose the Erika if you want maximum coverage and a modern oversized look; choose the 4305 if you prefer a refined retro aesthetic with the key bridge detail.
Our take: The Ray-Ban 4305 hits a sweet spot—retro styling that doesn't feel costume-y, a universally flattering phantos shape, and that key bridge detail that makes people ask "which Ray-Bans are those?" It's distinctive without trying too hard.
At a Glance
Ray-Ban 4306 Sunglasses
Pros:
- Hexagonal shape offers a more geometric, modern look
- Same key bridge and acetate construction as the 4305
- Works well for round and oval faces that need more angles
- Available in similar color options and polarized variants
Cons:
- Angular shape may not suit square or angular face shapes as well
- Less universally flattering than the softer phantos curve
- Slightly different aesthetic—more contemporary than retro
Ray-Ban Erika 4171 Sunglasses
Pros:
- Larger 54mm lens provides more coverage and a bolder look
- Oversized round shape is very on-trend
- Rubberized frame finish offers a unique matte texture
- Slightly lower starting price point
Cons:
- Larger fit may overwhelm smaller faces
- No key bridge—standard bridge design
- Rubberized finish can show wear over time vs. polished acetate