Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Are these adjustable for head size?
Document: head phones were just as described. perfect for watching tv and i am very satisfied with my purchase. exactly what i wanted.
for compatibility. My only complaint is that the ear cups are not totally "over the ear". If they were a bit larger they would rest completely against the head and not partially on the ear as they do.
wish i could return - you cannot control the volume to make it loud enough and we're not elderly, and it pinches your head - not large enough, should've gone for the wireless ones, they work well.
(as an aside, the problem with the HDR 140 was that the volume controls reside on the back of the cups, so if you recline the chair back and move your head at all, the volume setting changes - this was a really poor design).I also found that with these HD 65 TV phones, I would turn the volume all the way up and it still wasn't quite loud enough. I am returning these today to Amazon, and hope that Sennheiser goes back to the drawing board on these. Giving them a comfortable fit would most likely raise the price, but I would be okay with that.
The impedence is pretty low, so I need to adjust my system volume down to about 50% or its almost impossible to get the volume via the in line controls low enough for comfort. As far as wearing comfort goes they're excellent. I'm 6'4&#34; and have a big head. I mean a REALLY big head! I can wear these for hours on end with no pinching on my ears or pressure from the head band. Plus they're holding up really well - look brand new after almost two years of heavy use.
Enter these Sennheiser HD 65 TV headphones. They are advertised as having an "around the ear design" for longterm wearing comfort. The problem is that the area within the ear cups is too small in circumference to enable your ears fit completely inside. I have relatively small ears that rest close to my head, so my body isn't the problem. The headphones end up resting "on" your ears rather than "around" them. This becomes very uncomfortable after about 5 minutes, with your ears feeling pinched by the headphone cups.I have owned Sennheiser phones before, specifically the HDR 140 wireless headphones, and they fit just fine with my ears, the key being a larger internal space inside the ear cups.
You needed an adapter to plug into the RCA jacks on the back of the Tivo box.
Who do they think is buying these? I imagine if your hearing is just fine, you are not looking for a set of headphones to improve your TV  viewing experience.The search goes on...P.S. If you have a recommendation for wired headsets that work well for TV listening, please leave a comment.Thanks
We purchased these so my husband could listen to long-winded news broadcasts while I read and it has been a brilliant solution. They are soft and comfortable to wear; they have volume control and seal all of the sound in the headphones while it is utterly quiet elsewhere. We are both happy campers. You do need a connector cord from your TV to the place where you watch and listen. We have had them for about 6 weeks. A win win for us.Correction: I don't think you "need a connector cord" actually.
We always put on subtitles on any DVD that we watch, just so that I can understand what's going on. If people's voices were the same tone as the refrigerator, I'd have no problem.When I received these headphones today, I immediately hooked them up to the back of the TV using the Y-cable adaptorCables To Go - 03182 - 3.5mm Stereo Female to RCA Male Y-Cablewhich I also purchased from Amazon.The good news is that when you hook up the headphones, the speakers on the TV don't cut out, so that others can still hear it.
Answer: Yes, the ears slide up and down to adjust for the head size.