I feel your pain as I did the same with my stainless steel oven. I rubbed some oil gently on it and it did help, but the t cut idea sounds good!

Often with upstands people don’t have tiles as it can look a little clunky. They tend to paint the wall above with a washable paint instead. However, if you want tiles how about a pearlised finish, such as Zelig tiles in pink or blue? I can see you like pink!

Shutterstock [website] supply high quality images, either photo's videos, AI images etc and they're sold under licence on behalf of the original artist, so there's a massive library of images to choose from so you should be able to see the image before approval. Then the glass is screen printed on the reverse before going through the toughening process, all the glass i've seen which has been screen printed has looked stunning and i'd assume your glass supplier would have pictures and samples of their work [decent sized not little 100mm squares]. Cost wise though your cheapest option would be as Sonia says to go down the laminate splashback route which is a diy option.

Are you having wall units? If so you can have the backsplash up to them. If no wall units then 60cm is plenty enough with maybe a taller bit behind the hob. A picture of your kitchen would help us advise better.