Making a frame set

Hey! I'm just starting woodworking and I was asked to make a wooden frame set to put family pics in it. What tools would you recommend me to buy to set the frames perfectly? I read about calipers, they are cheap and can be useful in different projects. Could you recommend me one? Or should I just look at Amazon with good feedbacks?

Well I was searching dozens of forums and webpages and I finally found a detailed review with popular brands **LINK**

I got a digital caliper Neiko because of its price and good feedbacks. I’ve been using it for several weeks and can say it works fine. The screen is quite big so there’s no reading issues. And it can be switched into 3 different modes easily.

Learn to read the old fashioned vernier gauge ( which is what you have in your links) they are easy to read, stand a bit more knocking about and never run out of batteries, but then I am an old codger and a bit set in my ways

Ron