Package/web description indicates 4 inches. Was not 4’ long.

Bought one from lowe's (hillman brand) these hinges are just as good as the lowe's brand and less in cost. It comes with screws which are bigger and stronger than other brands. Great quality product for a reasonable price.

They are for frameless (ikea style) cabinets but they are full overlay instead of inset. If you mount them as inset there is not enough clearance for the door to open without scraping the box - even fully adjusted away from carcass.