window installation help needed

[alvinmcollins]

Hi, we are planning to renovate our living room :). The furniture purchasing is on half the way now. The main thing is about the replacement of door and windows. I have a huge collection of new trendy window designs which my friend has shared me. She is using windows from Clera. My doubt is about the installation. I have a 100x55mm timber frame.
Can I install aluminium windows that are 125mm and a door 110mm?
If so, what size reveals and sills would I need?

Any advice is greatly appreciated