Seis Black Prefinished Fire Door

Standard UK Door Sizes:

• 1981 x 381/419 x 35mm (sidelights/side panels)
• 1981 x 457/533 x 35mm (cupboard/wardrobe)
• 1981 x 610/686/711 x 35mm (restricted spaces)
• 1981 x 762 x 35mm (most common internal door size)
• 2032 x 813 x 35mm (usually former external door size)
• 1981 x 838 x 35mm (mobility/wheelchair access)

Metric Door Sizes (Popular in Europe/Scotland):

• Height: 2040mm
• Width: 426/526/626/726/826/926mm
• Thickness: 40mm

Measurement Tips:

• Measure door opening for height, width & thickness.
• Allow 2-3mm gap around the door for proper operation.
• Contact us for bespoke sizes.

Trimming Guidelines:

• Engineered timber doors can be trimmed to fit; consult our guidelines or contact us for advice.

View Our Full Size Guide

If you are unsure about your sizing, please contact us for assistance. We also offer bespoke / made to measure doors.