If you're looking for a slim single-serve coffee maker with a tiny countertop footprint, Keurig has you covered with 3 different brewers measuring just 4.8" wide:
Note: Technically, Keurig also makes the 4.5" K-Suite Premium, but that's a commercial brewer intended for hotel rooms and vacation rentals and not for home or office use.
Unlike the K-Mini and K-Mini Plus, which brew all of the water you pour into the reservoir, the K-Slim gives you 3 preset brew sizes from 8-12 oz in the same Mini-style design and a relatively massive 46 oz water reservoir.
While Keurig has released several models with much larger water tanks (75 oz on the Keurig K-Elite), 46 oz isn't anything to scoff at. That's almost the same size as the K-Classic's 48 oz reservoir, and the K-Classic is twice as wide at 9.8" with just a 10 oz max brew size.
The K-Slim's biggest downside?
Though it packs a 46 oz reservoir into a sleek package, the brewer's design makes its water reservoir non-removable. To refill, you need to pour water into the rear-positioned tank, which can be a problem if you don't have much over-brewer clearance.
