Small, narrow buildings on leftover space between larger ones -- called "pet architecture" in the book by Studio Bow-Wow -- are the subject of recent posts on the blog Scouting New York. Regarding 420 W 58 St pictured: "Exactly half a brownstone (12.5 feet), gloriously smooshed between two much larger apartment buildings. A number of readers have written me that the city used to sell lots in 25′ increments, and that developers would sometimes build two 'twin' houses, each measuring 12.5′, on a single property." Regarding 19 W 46 St: "This renovated brownstone, wedged between two much larger buildings, is only 12.5 feet wide and does not connect with either of the neighboring properties. The popular Turkish restaurant Akdeniz is on the bottom floor, while the second floor is occupied by the Antonio and Antoinette Beauty Salon. I was told that the upper floors are all apartments." But the skinniest building in New York City, according to The Real Deal, is 75 1/2 Bedford St: "75½ is only nine-and-a-half-feet wide on the outside, eight-and-a-half-feet wide on the inside, and 32 feet deep. Each of the four floors, including the basement, measures less than 300 square feet. The list of former owners and renters reads like a who's who of New York. There's the cartoonist William Steig and the anthropologist Margaret Mead. But the home's most notable resident, and the name etched into the plaque on its façade, is Edna St. Vincent Millay, the Pulitzer Prize-winning poet."