Product Details
Color Details
Size DetailsFrequently Asked Questions
Are Ray-Ban 4378F sunglasses prescription-ready?
What face shapes do Ray-Ban 4378F sunglasses suit best?
What is the difference between Ray-Ban 4378 and 4378F?
Do Ray-Ban 4378F sunglasses have UV protection?
What is the frame material of Ray-Ban 4378F sunglasses?
What are the measurements of Ray-Ban 4378F sunglasses?
Compare With Similar Frames
How the Ray-Ban 4378F Sunglasses stacks up against the closest alternatives we carry.
- Oversized round lenses (54mm) provide more coverage and a softer, retro look
- Rubber front frame with metal temples creates a unique texture contrast
- Flexible bridge design adds comfort and a distinctive style element
- Standard fit (non-Asian fit) may suit higher nose bridges better
- Similar square acetate construction and lens size (54mm)
- Same price range ($111–$178) and prescription-ready capability
Read the full comparison
Ray-Ban 4378F vs. Similar Styles: Which Frame Is Right for You?
Choosing between the Ray-Ban 4378F and similar models comes down to face shape, fit preference, and style. Here's how the 4378F stacks up against two popular alternatives in our collection.
Ray-Ban 4378F vs. Erika 4171: Square vs. Round
The Erika 4171 is Ray-Ban's best-selling women's frame, featuring oversized round lenses (54mm) with a rubber front and metal temples. If you have a round or oval face and want more definition, the 4378F's square lenses create sharper angles that balance softer features. The Erika's round shape is universally flattering but won't add the same structure.
Both frames offer 54mm lenses and 100% UV protection, but the 4378F is full acetate (lighter, warmer to the touch) while the Erika combines rubber and metal. The Erika's flexible bridge is a signature design element, but the 4378F's single-bridge acetate construction is simpler and equally comfortable. If you prefer a retro, softer look, go Erika. For modern, angular style, choose the 4378F.
Ray-Ban 4378F vs. 4376: Asian Fit vs. Standard Fit
The 4376 is the 4378F's closest sibling—both are square acetate frames in the same size and price range. The key difference is fit: the 4378F is designed with an Asian fit bridge (lower, wider nose pads and adjusted temple angles) while the 4376 has a standard fit.
If you have a lower nose bridge, higher cheekbones, or find that most sunglasses slide down or sit too close to your face, the 4378F will fit significantly better. The modified bridge prevents lens-to-cheek contact and keeps the frames stable without constant adjustment. If you have a higher nose bridge and standard facial proportions, the 4376 may be the better choice—it offers similar style with a fit optimized for different facial structures.
Both models are prescription-ready, offer gradient and polarized lens options, and feature the same durable acetate construction. Your decision should be based purely on which bridge design matches your facial anatomy.
Why Choose the Ray-Ban 4378F?
The 4378F is the right choice if you want a modern square frame with Asian fit engineering, transparent color options, and full acetate construction. It's ideal for oval and round faces that benefit from angular definition, and it's one of the few Ray-Ban styles that specifically addresses fit challenges for lower nose bridges. With prescription-ready lenses, 100% UV protection, and eight color options, it's a versatile everyday frame that works from the beach to the office.
At a Glance
Ray-Ban Erika 4171 Sunglasses
Pros:
- Oversized round lenses (54mm) provide more coverage and a softer, retro look
- Rubber front frame with metal temples creates a unique texture contrast
- Flexible bridge design adds comfort and a distinctive style element
- Flatters most face shapes due to the universally appealing round silhouette
Cons:
- Round shape may not add as much definition to round or oval faces as square frames do
- Metal temples can feel cooler in cold weather compared to full acetate
- The rubber finish can show fingerprints and smudges more easily
Ray-Ban 4376 Sunglasses
Pros:
- Standard fit (non-Asian fit) may suit higher nose bridges better
- Similar square acetate construction and lens size (54mm)
- Same price range ($111–$178) and prescription-ready capability
- Comparable color and lens options including gradient and polarized
Cons:
- Standard bridge fit won't work as well for lower nose bridges or flatter facial profiles
- Slightly less variety in transparent frame colors compared to the 4378F
- Not specifically designed for Asian fit, which can cause sliding or discomfort for some wearers