Unlike most square Ray-Ban models, the RB4147 Boyfriend pairs a plastic front with metal arms, and this aftermarket lens is cut in two sizes, 56mm and 60mm, to fit that combination front. Temple length runs 145mm, and the tint range covers the standard set, from solid grey to eight mirror finishes, a photochromic grey, and a clear AR lens for prescription wear.

A metal-armed, plastic-fronted build like this flexes differently at the hinge than an all-plastic frame, so the arms tend to hold their adjustment longer even as the front ages. That's one reason a lens swap on a frame like the Boyfriend is worth doing before assuming the whole pair needs replacing — the structural parts often outlast the lenses, and 56mm versus 60mm is worth confirming carefully since the two don't share a lens.

Frequently asked questions

Are these genuine Ray-Ban or Oakley lenses?

No — these are aftermarket lenses, independently made to match the 56mm dimensions of the Ray-Ban 4147. They aren't produced or endorsed by Ray-Ban; they're engineered purely to fit that frame correctly.

How hard is it to install replacement lenses myself?

Most Square frames use a simple press-fit: flex the frame slightly, seat one edge of the 56mm lens into the groove, then work your thumb around the rim until it clicks into place — no tools needed.

How much does it cost to replace lenses instead of buying a new pair of sunglasses?

A pair of 56mm lenses for the 4147 starts at €25.00, a fraction of a new Ray-Ban frame, and shipping is free worldwide with no minimum order, so the total stays close to that price.

What if the lenses I order don't actually fit my frame?

Every pair is matched to a specific model, in this case the 4147, so mis-fits are uncommon, but if the lenses don't seat properly you can return them within 14 days for a full refund, no questions asked.