A Flat-Top Rectangle with Real Visual Weight

Thick tortoiseshell acetate, a razor-flat brow line, and chunky geometric temples give the Ray-Ban Lukas RB4454 1359/B1 a character that buyers either recognise immediately or discover and don’t forget. These Ray-Ban Lukas havana rectangle sunglasses unisex take a classic flat-top silhouette and push it toward something more assertive. The frame sits wide across the face with a completely straight upper edge. Furthermore, the angular cuts at the outer corners of the front frame add a faceted quality that prevents the shape from reading as a plain rectangle. The full-rim acetate construction holds all four edges of each lens cleanly and solidly throughout.

Tortoiseshell, Dark Grey, and Gold — The Colour Story

The 1359 Havana colourway covers the entire frame in a rich tortoiseshell acetate. Deep brown and near-black tones dominate, with amber patches concentrated across the brow bar, outer rim edges, and temple surfaces. The gloss finish on the acetate allows the patterning to read with depth and contrast rather than sitting flat. Against this warm, patterned frame, the B1 dark grey lenses deliver a cool, solid counterpoint. The lens tone stays consistent and even across the full surface — no gradient, no mirror. Additionally, two gold-tone metal dot rivets sit at each outer corner of the front frame. These small circular details catch the light and add a tactile, metallic accent against the tortoiseshell.

Temple Design — The Hawkeye Detail

The temples on the Lukas RB4454 carry one of the more distinctive design elements in the current Ray-Ban lineup. Each temple arm runs wide and flat for most of its length, tapering only at the very tip. This wide, geometric temple profile — which Ray-Ban calls the Mega Hawkeye design — gives the frame a broad, structured side silhouette. The Havana tortoiseshell pattern runs continuously from the front frame through the full temple length without interruption. The gold-tone hinge hardware connects front to temple at the outer corner. The Ray-Ban script logo appears in gold on the outer face of the temple, just beyond the hinge. Temple tips taper in the same Havana acetate.

Numbers Worth Knowing

The RB4454 Lukas measures 56-20-145 in the lens width, bridge, and temple dimensions. The 56mm lens width places this firmly in the larger bracket for a rectangle sunglass. The flat-top profile and thick frame border make this frame read even larger than the 56mm figure suggests. The 20mm bridge is wide, which suits buyers with a higher or wider nose bridge. Similarly, the 145mm temple length covers most adult head widths. The lens height of 39mm runs shallow — this is a deliberately wide-and-shallow rectangle, which contributes to the bold, architectural quality of the overall silhouette.

Styling and Everyday Contexts

The Lukas 1359/B1 works best in contexts where the frame forms a deliberate part of the overall look rather than disappearing into the background. City wear, creative industry settings, social occasions, and travel all suit this model well. Because the Havana colourway sits in warm, earthy territory, it pairs naturally with neutrals, earthy tones, and muted palettes. The solid dark grey lens density suits full sunlight conditions rather than low-light or indoor wear. Buyers who want to compare this alongside other bold sunglass styles on the site can explore our designer sunglasses collection for further options across brands and colourways. Those looking at what’s arrived recently can also check our new arrivals for the latest additions. The Ray-Ban Lukas RB4454 in 1359/B1 is a full-rim molded acetate rectangle unisex sunglass at 56-20-145 with Havana tortoiseshell frame, solid dark grey crystal lenses, gold rivet details, and wide Hawkeye-style temples.