It’s too small. The keys are in the correct location & size for the Microsoft 600 wired keyboard yet somehow it’s too small. It can properly fit the 10-key or the regular keyboard but not both. And even for just the regular keyboard it’s a touch too small. No amount of pulling and taping it in place will fix the issue.Otherwise this would have been perfect. It’s a solid cover. Feels good on my fingers. I bought it so I could create a custom keyboard shortcut covering & this would have been perfect.IF IT HAD FIT PROPERLY!I’m currently debating if it’s worth the effort to return or if I should attempt to cut this into segments so it might fit to display written on shortcuts.UPDATE: after a LOT of pulling & tugging, & getting it warm, the cover is now technically on my keyboard. It likes to pop up above thru arrow keys which make the nearby keys (delete, home, the 10-key) side a bit. So since it now technically fits (though my typing accuracy has dropped since using it) I’ve added 2 stars to my initial review.