No worries. Glad I could help a little! Another thing when checking out frames is almost all of them have either on the arm or by the nose bridge 3 numbers printed. These numbers indicate the width of the lenses, the width of the nose area and the arm length. You can use this when shopping around to get a better idea of what size will fit you best! Also generally if you see a frame with round lenses, a good majority of the time (at least what we got at Costco) they will be a smaller pair of glasses. Of course it all depends on what style you want but, I would often guide more petite customers to these frames and they'd often find a better hit. Lens width would often be between 46-50mm while on average rectangular lenses were closer to 54-56mm. That isn't to say you can't find a rectangular lens that is a good fit though.

Honestly, they do such high volume in the lens lab when a frame that isn't from Costco is sent in it slows down the process dramatically just because they don't already have the pattern for that lens to trace. There are other things that can cause issues with the frame as well that the lab may deny. By the time I left Costco I was seeing 70% of the ones we sent in to see if the lab would accept, were denied.

If they're plastic, a lot of times ther is also concerns for the lip that holds them as it fades over time when pulling and pushing lenses in and out of the frame. Sometimes the lab has to do that more than several times to get the best fit and if there are concerns for possible lens not fitting or breaking the frame they won't take it for those reasons.

Honestly though of the companies I've worked for, I still shop and get my glasses from there. The only thing I was ever told to upsell was multiple pairs since they make more money on volume. Never had an issue trying to use an outside frame if we could.

Are they falling off your face cus they're broken or because over time the arms have widened or the curve has loosened behind the ear?

I used to be an optician with Costco and even really good frames have this happen. After several months they start falling and slipping due to a multitude of factors that an optician can generally do a simple reshaping/fitting and get them back to where they need to be.

If they're plastic frames, the plastic can become malleable after wearing them all day and being on your hot head, loosening a previous fitting if you ever had that done. As well if you take them off with one hand you can be stretching out one side as you drag the arm across your head to take them off. This is something I generally educated anyone when buying a plastic frames, it's not uncommon to need to get it refitted every now n then, while also showing them to take them off with two hands as they can mishape them or damage a hinge over time.

If you're wanting something to hold it's shape, you want a metal frame. Metal frames generally aren't as fashionable but they retain shape better. You can get silicone nose pieces too so that they have better traction on your nose and don't just slide like the hard plastic pieces that come standard on most frames. To make sure all of that works though, need to make sure they're properly fitted.

As far as a specific brand to recommend I don't really have advise there. Only ones i'd advise to avoid would be any plastic frames that are a very rigid plastic just because they tend to break easier when dropped or caught on something instead of just bending the frame out of shape slightly.