Originally Posted by bgeek
The caps you posted are for the 28mm caps which fit bottles with an opening of a 2-liter coke bottle. Many, if not most, commercial bottles of wine I have seen come with a 30mm cap
I just showed an example of what that shop was listing with their screw top bottles and has listed as a screw cap for their offered wine bottles, 28mm.
If you visit ECK they carry 28mm screw top clear bottle. The 30mm lids are usually used on growlers and gallons. Have not seen a 30mm 750ml screw top in my search, 28 most common I guess.
Here is another vendor that stocks the bottles and caps, http://www.weekendbrewer.com/WineBottles.html
I stumbled across three cases of commercial wine bottles with 28mm caps..I just finished bottling in them and capping with new black poly lids. It was a commercial label, out of NY. I know the majority of metal crimped commercial caps are 30.