How big is the diameter of the opening?
1599339
The diameter of the opening is 4 inches. If you read my review you will note that I do not recommend buying this teakettle.
1947390
With top off, top opening diameter = 2-1/8 inches wide, 9-1/8th inches tall, bottom Diameter = 3-1/4 Inches.
2002106
3 and 1/4 inches wide at the top (opening), approximately 2 inches wide at the bottom and almost 4 inches long. Hope this helps.
1939156
The diameter of the bottle opening is 2 1/16". The opening for drinking is oval shaped and measures 5/8" x 1/4" but it has a flap that opens and closes for drinking.
355349
If I remember correctly the actual opening is 8". I ended up not using it because the opening was described as 6", I believe.
990613
Opening is like a rubber donnut. The hole in the center is 3 inches diameter, but the rubber can bend open to about 6.25 inches (maybe even a little more). I had a pretty big wide cast almost up to my knee and was able to wiggle my leg into the opening.
571905
3 1/2 inches across opening. Big enough to handle large peaces of lead. Great to use on a camp fire.
1409380
I roughly measured it with a ruler. The opening is about 3" in diameter and 1" deep.
1739843
It's about 1 inch diameter. Not sure if that's exact, but I used a 7/8 drill and had to enlarge it a bit.
1943728
The diameter of the opening is about 2 inches and it's about 3 inches deep.
512559
the opening is quite wide, I use it for fancy salts, large rocky slat going there easy. It is about an inch in diameter.
1695895
I did not take exact measurements of the existing opening since i was only using these speakers as replacements. I would say the existing diameter of the hole was 6". The speakers sound great and the blue LED lights are a nice touch.
421892
I measured the maximum opening when the tightening screw engages. It was about 7/8 inch or about 22mm. You could perhaps increase this with a longer tightening screw.
471146
The opening with the lid removed is about 2-1/2 inches across. The opening for drinking is a slit, not as big as a disposable water bottle.
1879199
I cannot tell you the diameter but there is a seal for it. Perhaps the Amazon people know the diameter of the hole itself. Good Luck!
278312
The diameter of the opening is jus 11". The 14" measurement is the outer edge of the lip to outer edge.
1375052
The actual opening is 2 1/4 inches wide. The lid fits into an opening that is 3 1/2 inches wide. I hope this helps.