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

Input:
Question: What are the outside dimensions?
Document: Unit arrived very quickly (two days) double boxed in excellent condition by USPS. . Only complaint is that it seems to run too much and outside of door and bottom are very cold indicating poor insulation in those areas. Yearly cost to operate may have been under-rated.
You know what I mean. The first unit did not seem new. It had no dents, and after sitting three hours, I turned it on and walla! It immediately cooled into the twenties. And I didn't need a thermometer to prove it. When I took a beer out, it  frosted on the outside. So I'm a happy camper. But, like other buyers, it took more than one attempt.
This refrigerator is reliable, it has maximum space inside because no space is lost for an ice cube tray or freezer section. The compartments are well thought out and provide maximum storage for bottles, boxes, and food containers. The outside and inside or made of quality material and the compressor is quite. It has an auto defrost cycle allowing for carefree operation. I would buy this refrigerator again, it was a leader of choice over all the other brands that I reviewed.
I read the reviews. Some buyers said their new refrigerator didn't work or made very loud noises when they turned it on. Others said it worked great. I took a chance. Nope. The piece of garbage never got cold. In fact, the inside became warmer than the 68 degrees office temperature! It is running; I hear it and the motor is very warm. So warm that it made the inside compartment warmer than outside. Now what?
Like too many of the reviews for this product the first one I ordered was noisy and had a very warm spot to the touch on the lower left outside. In addition to a buzzing sound, it made a fairly loud rhythmic bubbling noise like Darth Vader in SCUBA gear. Didn't work for my bedroom.I returned it and the replacement arrived double-boxed from the factory, unlike the first one I ordered. The replacement has none of the issues the first one had, and I'm happy with it so far.
wow 100 dollars to keep my red bull and waters chilled all dayamazing valuethere is no noise because i set it at 30 percent in the dial in the backand it keeps it so cool and chilled that it doesnt even turn on its so quietmaybe few times it turns on to maintain the temp but its quite , VERY quietplus i sleep fast now , it feels like im in a expensive hoteli love it , one of the best buys on amazon
works nice for a little space... little but does the job, good price for what i got, came quickly, would buy again ...
works great supper cold real quiet stores any where. I would recommend this to any one. Now stop reading this and go get one :)
works great as an office fridge. quiet, compact and spacious inside. no freezer unit in it but as a fridge, no complaints.
works great  no complaints. it suits my needs just fine... just gotta play with the adjustment a little because it will freeze.
Answer: The outside dimensions are 20 inches tall, 18 inches wide and approximately 20.5 inches deep.  The refrigerator box is 18.5 inches deep but there is a control unit on the back that sticks out about 1.5 to 2 inches.