how long is a curling sheet

A standard curling sheet is about 150 feet (45.72 meters) long from end board to end board, with an allowed range of roughly 146 to 150 feet (about 44.5 to 45.7 meters) under modern rules.

The actual “playing area” between the back boards is slightly shorter (around 146 feet or 44.5 meters), and the distance from hack to hack is typically about 138 feet (42.1 meters).