Research Different Styles Online
Saint Laurent produces several iconic styles, each with its own distinct features. Before examining a bag, confirm the style exists as an official Saint Laurent release and compare the dimensions, hardware and materials against the official Saint Laurent website or a trusted archive.
LouLou / Lou Camera
A soft, quilted YSL shoulder bag with the Cassandre plaque, available in smooth leather or chevron quilting — one of the house's bestsellers.
Sac de Jour
A structured top-handle tote with a clean, architectural silhouette, accordion sides and minimal hardware.
Niki / Sunset
A slouchy, vintage-effect shoulder bag in crinkled leather with a Cassandre plaque and a tassel-topped zipper.
Kate / Envelope
A slim flap shoulder or clutch bag in smooth or quilted leather with a tassel and the signature Cassandre front clasp.
A bag mixing hardware, lining or silhouette elements that never appear together on an authentic Saint Laurent release is an immediate red flag. Counterfeiters frequently combine details from different models.
Examine the Cassandre Logo Plaque
The YSL Cassandre monogram plaque is Saint Laurent's defining feature. On an authentic bag the gold or silver plaque is solid, deeply engraved, with crisp, perfectly proportioned lettering that sits flush and centred on the bag.
Counterfeits use thin, lightweight plaques with shallow or painted engraving, off-centre letters and a brassy or dull finish.
- Original: Solid plaque, deep clean engraving, flush and centred.
- Fake: Thin, lightweight, shallow/painted engraving, off-centre.
Check the Leather & Quilting
Saint Laurent uses smooth or grained calfskin, and chevron quilting on the LouLou. Authentic leather is soft yet holds its shape, with a subtle sheen and natural aroma. Quilting is even, the chevron pattern aligned across seams.
Fakes often use stiff, plasticky leather, uneven quilting, or a pattern that drifts out of alignment at the edges.
Verify the Interior & Heat Stamp
Authentic Saint Laurent bags carry a heat-stamped interior leather tag reading 'SAINT LAURENT PARIS' in an even, deeply impressed font, often with a serial number beneath. The stamp is clean, not printed, and the tag is neatly stitched in place.
A printed (not stamped) tag, glued-in label, misspelled name or mismatched serial is an immediate red flag.
- Tag reads 'SAINT LAURENT PARIS' — note the spelling, not 'Yves Saint Laurent'.
- Stamp is deeply and evenly impressed, in foil that does not rub off.
- Serial number is consistent with the model and era.
Tip: Since 2012 the brand uses 'Saint Laurent Paris' on the interior tag — older 'Yves Saint Laurent' tags should match older bag eras.
Inspect the Hardware & Zippers
Saint Laurent hardware is solid and evenly plated. The Cassandre clasp snaps firmly, chain links are weighty and soldered closed, and zippers (often Lampo or riri) run smoothly with the maker's mark on the reverse of the pull.
Lightweight, hollow hardware, stiff zippers and shallow engravings are common fake indicators.
Check Stitching & Edge Paint
Authentic stitching is even, slightly angled and consistent in tension. Edge paint on leather is smooth, glossy and continuous — never cracked, peeling or lumpy at the corners. The chevron quilting must align across every seam.
Know the Real Prices
A new LouLou medium retails above $2,700, the Sac de Jour small above $2,800 and the Niki above $2,900. Pre-owned authentic pieces hold strong resale value.
A LouLou offered for a few hundred dollars is a fake. The price must reflect current Saint Laurent retail and resale values.
Any offer that sounds too good to be true is a red flag.
Frequently Asked Questions
Is it 'Yves Saint Laurent' or 'Saint Laurent Paris'?
Since 2012 the brand uses 'Saint Laurent Paris' on interior tags and hardware. Older bags may read 'Yves Saint Laurent'. A modern bag carrying the old tag (or vice versa) is a red flag — the tag must match the era.
Do Saint Laurent bags have serial numbers?
Yes — an interior heat-stamped tag carries a serial number alongside 'SAINT LAURENT PARIS'. The serial must be cleanly stamped and consistent with the model. A correct serial alone is not proof.
Is the Cassandre plaque enough to confirm authenticity?
No. The plaque is a strong indicator but must be cross-checked against the leather, heat stamp, hardware and stitching. High-end fakes reproduce a convincing plaque but fail elsewhere.