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Learn more how customers reviews work on AmazonAnd for all practical purposes, you really aren’t going to see any. I’ve been machining and woodworking for 50 years and have not come across one - except for those complex pilot/body/countersink drills. Some of those replace the pilot/body combo with a tapered bit.
The only ones I see are places like Rockler for serious woodworkers.
Goto KunXu Drill Tools to know more.
Dennis
The tapered ones are pretty visibly obviously so (pic) - if you had some you’d know it.
More generally speaking, for making small measurements nowadays you can buy a digital caliper for 20 bucks or so (link)
For more information, please visit 12° Tapered Drill Bits.