Might be fine for larger heads
937261
It was too big for my head, came off of my head too easily.  Never got as far as listening to music with them.
2773822
Let me guess, you have a giant dome, like me, and you searched Amazon for "sunglasses big head" or "sunglasses wide frame" or something like that, right? Well, I'm sorry to report that these are still a bit tight on a plus-sized noggin. Was the right style, but still a bit small for my bobble-head.
4393551
Pretty much no matter what size your head is this is difficult to fit. I understand it is a novelty item and therefore it can serve its purpose for short periods of time.
1708936
If you have a rather large head like me, these won't be very comfortable to wear. I used these for a few hours straight and found myself getting a headache around my jaw bone due to the pressure being put on my ears. And fully expanded, they did not quite reach down far enough to cover my ears. I ended up putting them on at an odd angle to get them to fit over my ears.

The fit is disappointing because I really like the sound quality and the Bluetooth connectivity to multiple devices worked extremely well.

If you have a Bose retail outlet nearby, I suggest going there first to try these on before buying them.
1029322
This beanie is pretty lightweight and if you have a large head it will probably be a pretty tight fit.  Quality is good, not great.
2005866
Seems like a decent set but very tight fitting. Good for those with smaller heads but those with larger heads should probably look elsewhere for a more comfortable pair.
3115552
I have a big head and these don't really fit my eyes very well. Maybe my son will be getting these for x-mas instead of me.
1662914
Fairly comfy but not for larger ears (mine are 67mm top to bottom), unless you don't mind ears being a bit folded.  My ears would not fit.
695031
Honestly it doesn't fit great. Very flimsy and looks funny if you have a big head. But for the price, it's alright.
3747732
I have a smaller than average size head, so I'm not surprised.  It may become a problem when it starts to  stretch out.
2294816
I had high hopes for this product after reading all of the positive reviews, but sadly it did not work out for me.  I am a big guy with a large head, and the hard plastic band that connects the ear pieces is to rigged to move to accommodate a large head.  The curves in the back are intended to change the angle of the ear piece, but all they do is prevent you from moving the headphones far enough onto your head to make it over your ears.  I gave them to my wife, if she likes them I will update later with a positive review.
2360975
I have a big head and have always had a problem with hats fitting. This fits barely. Almost perfectly, but the bottom of the hat comes to the bottom of my ears so I have to adjust once in awhile. I'm 5'11" /Male. I think it would be fine for the majority of people. The speakers get loud but it's not top-notch sound quality. The cord is 4ft long, plenty of length. Still well worth it and I ordered a second one.
3916149
They are probably a decent goggle but just not for somebody with a larger head.  None of the different size nose pieces would fit.
3480414
The size of these as described in the information section sounds reasonable. I understood that there would be some leeway, and that they would fit most, if not all, heads. Unfortunately, they do not. These are tight - very tight - so tight I had trouble getting them off. How big is my head, then? Not big at all. While I'm not a pinhead, I do have a narrow, oval female head, not wide at all. I would feel fine buying these for a toddler. They fit like swimming goggles on adults.
4250021
I have a big head - 23.5 inches around.  it is  hard for me to  find a baseball cap that fits.  However These glass were designed for  really huge head. and were swimmingly large on my head.  I was hope the large meant wider across the front/face like in eyeglasses  but apparently large means larger between the ears also.  So,  I unfortunately had to return them.  Easy and fast return communications with the seller.  cost to return was around $6.
63791
It is an entirely adequate wig. Probably better for smaller heads.
3644519
It says one size fits all but that is not the case. If you have a bigger than average head, I wouldn't buy this hat.