<Tr> <Td> </Td> <Td> The examples and perspective in this section deal primarily with standard US sizes and do not represent a worldwide view of the subject . You may improve this article, discuss the issue on the talk page, or create a new article, as appropriate . (January 2014) (Learn how and when to remove this template message) </Td> </Tr> <P> A sheet pan that has a continuous lip around all four sides may be called a jelly roll pan . A pan that has at least one side flat, so that it is easy to slide the baked product off the end, may be called a cookie sheet . </P> <P> Professional sheet pans used in commercial kitchens typically are made of aluminum, with a 1 in (2.5 cm) raised lip around the edge, and in the United States come in standard sizes . The full - size sheet pan is 26 by 18 in (66 by 46 cm), which is too large for most home ovens . A two thirds sheet pan (also referred to as a three quarter size sheet pan) is 21 by 15 in (53 by 38 cm). A half sheet pan is 18 by 13 in (46 by 33 cm); quarter sheets are 9 by 13 in (23 by 33 cm). The half sheet is approximately the same size as mass - market baking sheets found in supermarkets, and the quarter sheet is a common size for rectangular, single - layer cakes . Other commercial kitchen equipment, such as cooling racks, ovens, and shelving, is made to fit these standard pans . </P> <Table> Common U.S. Baking Tray Dimension Conventions . Values are approximate and vary based on rim size and style . <Tr> <Th> Conventional Size Name </Th> <Th> Width (in) </Th> <Th> Depth (in) </Th> <Th> Height (in) </Th> </Tr> <Tr> <Td> Full </Td> <Td> 26 </Td> <Td> 18 </Td> <Td> </Td> </Tr> <Tr> <Td> Two Thirds / Three Quarters </Td> <Td> 21 </Td> <Td> 15 </Td> <Td> </Td> </Tr> <Tr> <Td> Half </Td> <Td> 18 </Td> <Td> 13 </Td> <Td> </Td> </Tr> <Tr> <Td> Quarter </Td> <Td> 13 </Td> <Td> 9.5 </Td> <Td> </Td> </Tr> <Tr> <Td> Eighth </Td> <Td> 6.5 </Td> <Td> 9.5 </Td> <Td> </Td> </Tr> </Table>

What are the dimensions of a half sheet cake pan