Tracing paper graph paper for architectural floor plans, B4 and A4 sizes, 25 sheets per pack. - Sizes: B4, A4 - Number of pages: 25 sheets - Application: Architectural floor plans - Grid: Graph paper This graph paper is for architectural design, with 1 ken (unit of measure) = 18.2 mm (1/100 scale) divided into 4 squares. Fine lines are printed on both sides of the grid lines to allow for the inclusion of wall widths. Black ink frames for writing titles are also printed, making it ideal for floor plan planning. One B4 pack was stored without a bag and has discolored. Also, this one pack has creases on all pages (see photo 2), but the tracing paper is still usable. Instant purchase without comments is welcome. Please understand that this is a used item, inspected by an amateur, and stored at home.