If you have a smartphone there are a some apps that will do this -- you can search the iPhone app store for "cigar" and find some apps. I downloaded MobileStogie before it changed owners. Both the original and new owners are BOTLs here on CA. It's pretty good and I think it is under $5. There are some other apps that are less expensive.
You can also search CA for more info -- there are a couple of Android apps as well.
Excel is fine if that is what you want. The nice thing about the phone apps is that most have cigar info "at your finger tips" so you can look up sizes and in some case see images.
The hardest part with all of this is keeping the data current -- which is a problem regardless of how you do it. If you are not one to keep it current in the long run then don't waste your time...
Just my
