I got my Jolla TOH (The Other Half) a couple of weeks ago and I'm still not using it as my main phone for a couple of reasons - 1. It's so very slippery 2. It has no screen protector. Yes, it has Gorilla Glass 2 and people in the Jolla forums keep saying you don't need a screen protector but that's what they said about my Nokia n9 too and I managed to scratch that screen. To put my mind at ease I wanted to put a screen protector on my Jolla but currently nobody makes one. I imagine since the phone still isn't available in the States it will be quite some time before there's accessories for it. With that in mind I went looking for an alternative.
Most screen protectors for other phones have cutouts for front facing cameras, buttons and microphones all in the wrong places or their screen is a completely different size. The Jolla has a 4.5 inch screen but the glass area is closer to 4.9 inches. One one end the front facing camera and microphone take up a bit of space so ideally I need a protector 4.7 inches long with no cutouts. The HTC One ended up being my best chance so I ordered a three pack of plastic screen protectors for the HTC One and boy do they fit the Jolla. I'd say there's NO room side to side as it's a perfect fit. Lengthwise there's about a 1/4 of an inch or less of uncovered space where the camera and mic are. I couldn't imagine a better fit from a screen protector that isn't designed for the Jolla.
With that I installed it and am very happy with the fit. However, what I really want is a tempered glass screen protector which Amazon has for $25. Now that I know the HTC One protectors are perfect I'll probably order one. Stay tuned.