While Neapolitan pizza defines the tradition, immigration, local ingredients, and oven technology have produced a remarkable global family of styles. New York-style pizza is the most famous American adaptation: larger and thinner than Neapolitan, with a foldable crust that bakes in 10 to 15 minutes at 500 to 550°F in a gas or electric oven. The New York slice is typically one-eighth of a 16 to 18-inch pie, designed to be folded lengthwise and eaten on the go; "by the slice" shops, where a slice typically runs $3 to 5 USD, remain a foundation of NYC dining culture. Detroit-style pizza, by contrast, is rectangular and deep-dish, baked in a blue steel pan with cheese pushed all the way to the edges, where it fries into a crispy lace called frico. Buddy's is the iconic Detroit pizzeria credited with creating the style, and a Detroit pie is topped in reverse order — cheese first, then racing stripes of sauce applied after baking — and traditionally uses Wisconsin brick cheese, with a soft, well-fermented bottom layer often called the "white tab."
Chicago offers two very different interpretations: the tall, sauce-on-top Chicago deep-dish, which bakes slowly with cheese beneath a thick tomato layer, and Chicago tavern-style, a thin, crispy pie typically cut into squares (the "party cut"). Sicilian pizza is thick and rectangular, often built on a focaccia-like base, while Roman pizza splits into two forms: pizza al taglio, sold by the slice from rectangular trays, and pizza tonda, a round, thin, crispy Roman pie. California-style pizza is known for innovative toppings like barbecue chicken, a tradition often credited to Wolfgang Puck. Greek-style pizza, common in New England, uses a thicker crust baked in an oiled round pan. St. Louis-style is cracker-thin, square-cut, and traditionally made with a processed cheese blend called provel.
Several smaller regional traditions round out the picture. Bar pizza features a cracker-like base popular in taverns. Grandma pizza, a Long Island style, is a thin square pie with minimal cheese under the sauce. Pizza Strip, a Rhode Island favorite, is a focaccia-like rectangular pizza with sauce and no cheese. Pan pizza is a thicker style baked in an oiled pan, with skillet pizza — pan pizza's cast iron cousin — as a popular home variant. Each style reflects the immigrant history and equipment of its region, and understanding them helps frame the choices a pizzaiolo (the professional title for a pizza maker) makes.