Product Details
Color Details
Size DetailsFrequently Asked Questions
Are the Saint Laurent SL 174 sunglasses prescription-ready?
What face shapes work best with the SL 174 square frames?
Do the SL 174 sunglasses offer UV protection?
What are the measurements of the Saint Laurent SL 174?
How do customers rate the fit and comfort of the SL 174?
What's included with the Saint Laurent SL 174 sunglasses?
Compare With Similar Frames
How the Saint Laurent Classic SL 174 Sunglasses stacks up against the closest alternatives we carry.
- Injection-molded construction offers maximum flexibility and lighter weight
- Longer 145mm temples (vs 140mm) may fit larger heads more comfortably
- Part of Saint Laurent's newer 'accessible and cool' signature line with updated logo
Read the full comparison
Saint Laurent SL 174 vs SL 318: Which Square Frame Is Right for You?
Both the Saint Laurent Classic SL 174 and SL 318 deliver the brand's signature square aesthetic in the same 56mm lens width, but they take different approaches to construction and fit.
Construction & Materials
The SL 174 uses traditional full acetate construction—the same premium material Saint Laurent has relied on for decades. It feels substantial in hand and offers excellent durability. The SL 318, meanwhile, features injection-molded construction designed for maximum flexibility and reduced weight. If you prefer the classic feel of acetate, the SL 174 is your frame. If you prioritize the lightest possible weight for all-day wear, consider the SL 318.
Fit & Dimensions
The SL 174 measures 56-17-140, while the SL 318 measures 56-17-145. That 5mm difference in temple length may seem small, but it matters if you have a larger head or prefer frames that wrap more securely around the ears. Both frames offer a stable bridge fit—customer reviews for the SL 174 specifically praise the no-slip bridge design.
Style & Branding
The SL 174 is part of Saint Laurent's Essential collection with the classic engraved and enameled logo on the temples. The SL 318 belongs to the newer Saint Laurent Signature line with updated branding used across the brand's ready-to-wear and accessories. The SL 174 skews slightly more feminine with its "oversized feminine squared shape," while the SL 318 is marketed as gender-neutral.
Price & Value
At Designer Optics, the SL 174 starts at $181.41, while the SL 318 ranges from $186.78–$233.18. Both are exceptional values for authentic Saint Laurent eyewear. The SL 174 offers proven customer satisfaction and a slightly lower entry price, making it the smart choice if you want classic Saint Laurent style at the best value.
Our Recommendation
Choose the SL 174 if you want the classic acetate feel, proven customer-loved fit, and the best price. Choose the SL 318 if you need longer temples, prefer ultra-lightweight injection construction, or want the newest Saint Laurent branding. Both are excellent frames—your decision comes down to fit preference and style priority.
At a Glance
Saint Laurent Classic SL 318 Sunglasses
Pros:
- Injection-molded construction offers maximum flexibility and lighter weight
- Longer 145mm temples (vs 140mm) may fit larger heads more comfortably
- Part of Saint Laurent's newer 'accessible and cool' signature line with updated logo
- Available with photochromic lens options for adaptive light protection
Cons:
- Slightly higher price range in some variants
- Injection molding may feel less premium than traditional acetate to some buyers
- Less color variety compared to the SL 174's four original colorways
- Newer model with less established customer feedback