What size are the internal screws?

I need to find some replacement screws for the HTC Vive.

About a year ago the USB port broke away from the internal board in the HMD. I disassembled the whole thing to replace the USB port. The process was taking too long and I decided to splurge and get the Pro headset and hence forgot about fixing the older one.

I’m now looking at fixing it and have all the parts except the screws, seem to have lost them when moving house. No idea what size screws to buy to fix it all back up!