Product Details
Color Details
Size DetailsFrequently Asked Questions
Can I get prescription lenses in the Saint Laurent SL 587/K sunglasses?
What is recycled acetate and how durable is it?
What size are the Saint Laurent SL 587/K sunglasses?
Do these sunglasses provide UV protection?
How does the SL 587/K compare to the Saint Laurent SL 318?
Are Saint Laurent SL 587/K sunglasses unisex?
Compare With Similar Frames
How the Saint Laurent SL 587/K Sunglasses stacks up against the closest alternatives we carry.
- Larger 56mm lens width for more coverage and a bolder look
- Injection-molded material offers maximum flexibility and lightness
- Slightly lower price point ($186–$233 vs $180–$181)
- Similar price point and acetate construction
- Classic Saint Laurent design language
- Full-rim square shape with prescription compatibility
Read the full comparison
Saint Laurent SL 587/K vs SL 318: Which Square Frame Is Right for You?
If you're choosing between the Saint Laurent SL 587/K and the SL 318, you're looking at two excellent square acetate frames from the same brand family. Both deliver Parisian style and quality construction, but they differ in key ways that matter for fit and feel.
Size and Fit: The SL 587/K measures 53mm across the lens, while the SL 318 is larger at 56mm. That 3mm difference is noticeable—the SL 587/K sits closer to your face and works well if you have a smaller to medium face or prefer a more compact frame. The SL 318 offers more coverage and a bolder presence, ideal for larger faces or anyone who likes an oversized square look.
Materials and Sustainability: The SL 587/K is made from recycled acetate, a plant-based material that reduces environmental impact while maintaining the durability and flexibility acetate is known for. The SL 318 uses a different injection-molded material engineered for maximum lightness and flexibility. If eco-conscious materials matter to you, the SL 587/K has the edge.
Design Details: Both frames feature the Saint Laurent logo on the temples, but the execution differs. The SL 587/K has a lasered logo with color that matches the frame, creating a cohesive look in bold colorways like fuchsia. The SL 318 has a broader logo treatment. Both are prescription-ready and offer 100% UV protection.
Our Take: Choose the SL 587/K if you want a more compact fit, prefer recycled materials, and like the idea of color-matched logo detailing. It's the better choice for smaller faces and anyone drawn to the classic wayfarer silhouette. Go with the SL 318 if you want a larger frame with more coverage, prioritize ultra-lightweight construction, and prefer a bolder square aesthetic. Both are excellent entry points into Saint Laurent eyewear at competitive prices.
At a Glance
Saint Laurent Classic SL 318 Sunglasses
Pros:
- Larger 56mm lens width for more coverage and a bolder look
- Injection-molded material offers maximum flexibility and lightness
- Slightly lower price point ($186–$233 vs $180–$181)
- Broader Saint Laurent logo treatment on temples
Cons:
- Larger size may not suit smaller faces or those preferring compact frames
- Not made from recycled materials like the SL 587/K
- Less color variety in the lasered logo detail
Saint Laurent Classic SL 174 Sunglasses
Pros:
- Similar price point and acetate construction
- Classic Saint Laurent design language
- Full-rim square shape with prescription compatibility
Cons:
- Different styling and proportions than the wayfarer-inspired SL 587/K
- May not offer the same recycled acetate eco-conscious appeal
- Less variety in bold colorways