Ray-Ban Plastic frames?

I saw two pairs of Ray-Ban plastic frames at pearlevision that I really liked, but neither fit me. When I put them on, they felt way too tight, as if they were not long enough horizontally across my temples. My question is whether or not there is a way to get plastic frames like these in bigger sizes? Or could I have them adjusted? Maybe my head is just too big for that style, not sure.

I'm pretty sure the frames I was looking at were these:

http://www.pearlevision.com/eyewear/Ray ... tal.action

http://www.pearlevision.com/pv/eyewear/ ... ack.action

Ray Ban RX 8613 comes in two lens sizes: 51 mm and 53 mm. If you tried on the 51mm and it is too tight, the 53 mm should work fine. Ray-Ban RX 5095 also comes in two sizes: 50 mm and 52 mm. Same thing: one is smaller and one is larger. If you would like to compare these two models: RX 8613 in 53 mm size is larger than RX 5095 in 52 mm size.

In my opinion both these frames even in the larger size feature medium fit. If you are looking for a large fit, I would recommend Ray Ban RX 5114 in 54 mm size.

Ray Ban frames made from plastic usually can be slightly adjusted. But not when they fit too tight. If that's the case, just go with a larger eyeglasses frame.

Liz wrote:Ray Ban RX 8613 comes in two lens sizes: 51 mm and 53 mm. If you tried on the 51mm and it is too tight, the 53 mm should work fine. Ray-Ban RX 5095 also comes in two sizes: 50 mm and 52 mm. Same thing: one is smaller and one is larger. If you would like to compare these two models: RX 8613 in 53 mm size is larger than RX 5095 in 52 mm size.

How exactly does sizing work with glasses? I was looking on the tag and there were a series of numbers, but I wasn't sure which numbers indicated whether the glasses are longer.

In my opinion both these frames even in the larger size feature medium fit. If you are looking for a large fit, I would recommend Ray Ban RX 5114 in 54 mm size.

Can you recommend any larger-sized plastic frame glasses with the nose-pads like the RX8613?

Whoops, didn't mean to post as a guest.

Take a look at Ray Ban RX 5171. It is available in a larger size and has silicone nose pads.
The size is usually marked on one of the frame arms. Take a look at the picture attached. The first number usually corresponds to the lens size (or diameter in other words), the second one is distance between the lenses and the third one is a temple length.