Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What is the diameter (dimension from side to side) of the round dish.
Document: This may be preferable if you don't want to light up the area but in any other case go with the soleus dish heater.
The Heat Dish was like having fire place lighting but this is like having a blinding spot light shone in your face.
Fast! Efficient! Quiet! Safe!Why three stars then? One for its size (very bulky). One for its brightness. My eyes cannot stand that so the dish is always sitting behind me, never in front.
We refer to it as "turning on the sun." Imagine a 50 watt bulb with a silver reflecting dish pointed at you.- See the angle that it's pointed in in the picture? It's slightly up. It's as low as it goes, it doesn't go directly straight or down - why does this matter? We'll because say I want to heat myself from behind so it doesn't blind me - I can't place it on a shelf or table..
I previously owned a Soleus Air Flat Panel Reflective Heater MS-11 and really loved it. This one just put out way too much heat. On the plus side, I like the timer.
I love this heater. It's so warm and really feels like the sun is shining on me from indoors! It is sort of bright in the highest position, but if it's not right in front of your face, it shouldn't bother you too much. I usually put it somewhere to the side of my face. That helps.
Buy a Presto Heat Dish. This one didn't last a year and only puts out decent heat if you have it on High and oscillating so there is no low amp option that's viable. Didn't realize this was a different brand from the Presto when I bought it.EDIT Oct 2013Decided to plug it in again and see it was a bad as I remembered last winter and now it doesn't even turn on. Really a piece of junk!!!
I bought this to replace a Presto Heat Dish that broke. Overall I'm happy with it. It heats well and I like that it oscillates like a fan (in fact it basically looks like a fan with a heater core). It's also nice that the low setting uses half of the energy as the Heat Dish. My only complaint and warning is that this thing is BRIGHT! On the high setting, you literally cannot look at it--it's like looking directly into the sun.
I was expecting high about this heater.But I did not like few things about this unit. The light is too bright. If we put it at front side of visibility, it distract reading. The cord comes with certain length (~4 feet I think), which made it difficult to place it somewhere where it can give heat from behind. Size is little bigger, so you cannot just place it anywhere.
Now, I am ready for colder weather.I gave it four stars for being a little on the flimsy side, and being mostly plastic.Update....Oct 15, 2013:Really liking this one. Works good in the garage so far...but not too cold yet...so far so good. The back does not get hot even on high. I am not worried about anything behind the heater.
Answer: Why don't you look up the specs online. I already threw all 3 of mine away. I would advise you to get an extended warranty on these since they do burn out after a year and a half worth of use. They are amazing though when they do work. I decided to get a similar one from Costco since I know I can always return it with them if it burns out. Hope this is helpful.