The Ray-Ban RB3447 Round Metal pairs a circular metal front with slim 145mm temple arms — the same length and metal build used on this compatible pair. Round-front models like this one rely on a narrower hinge plate than square styles, so getting the length and metal gauge right matters more than it does on a boxier frame.

On thin metal arms, the first part to fail usually isn't the metal itself but the plastic tip sleeve near the ear, which hardens and splits well before the wire underneath bends or corrodes. It's worth checking that sleeve on your old pair before assuming the whole arm is worn out. Where the arm itself is bent or the hinge is loose, a compatible replacement is the cheaper fix next to sourcing a full round-metal frame.

Frequently asked questions

What if the arms arrive and the hinge doesn't line up with my frame?

Because each pair is listed against a specific model, in this case the 3447, mismatches are rare, but you're covered by a 14-day return window if the 145mm arms don't align with your hinge.

How do I know these arms will fit my Ray-Ban frame?

These arms are made specifically for the 3447, matching its 145mm length and Round hinge design, so they attach to your existing screws and hinge without any filing or adjustment needed.

What material are the arms made from, and will the color match my frame?

The arms are molded in an acetate or metal finish that matches the Round style of the 3447 closely, though very slight shade variation is possible since they're independently produced as separate aftermarket parts rather than cut from the same batch as the frame.

Do I need a specific screwdriver to attach these myself?

You'll need a small eyeglass screwdriver, typically included in basic repair kits, to remove the old hinge screw and attach the new 145mm arm to your 3447 frame — the whole swap usually takes under five minutes.