Aviator fronts sit differently on the face than square or round ones, with the arm meeting the double-bridge front at its own particular angle — and on the RB3025 Aviator Large Metal, that arm runs 140mm in metal, which is what this compatible pair matches. Aviator arms across Ray-Ban's range aren't all one length, so 140mm is specific to the 3025 rather than a generic aviator fit.

Aviator arms tend to be thinner-gauge than square or rectangular metal arms, since the style relies on a light, minimal look — which also means they hold an adjustment less firmly over time and can end up bent from repeated bending back into shape. If an arm no longer sits level or won't hold the angle you set it to, that's usually fatigue in the metal itself, and a replacement pair restores the fit rather than another round of bending.