F0

With substantial dimensions of 841mm x 1321mm, the F0 format boasts a sizeable surface area of 1.11 square meters. As the largest entry in the F series of transitional Asian paper sizes, F0 exceeds even PA0 and sits between the non-standard Emperor format and F1. The elongated shape of F0 gives it a more squarish 4:3 aspect ratio compared to the narrower PA sizes. This F series dates back to adoption in China and Southeast Asia to bridge gaps left by limited ISO standard options. As the biggest F size, F0 is sometimes known as Metric Royal or F Poster and leverages its considerable area for uses including oversized advertising posters and multi-panel exhibition displays when ISO sizes fall short. Despite lack of formal standardization, F0 has established itself regionally by building on traditional East Asian paper formats to fulfill special large-format needs. It lacks the precise scaling of the PA system but suits applications favoring its shape and sheer size at even greater dimensions than PA0. Going above and beyond PA0, the aptly named F0 anchors the F series while demonstrating the regional demand and utility still present for transitional sizes larger than any global standard can offer.