You will need to cut it to fit the build plate and has I have been very happy with the upgrade. I have to warn you that the adhesive is very strong and it may damage the flexible plate if you ever need to take it off for replacement, but I have been using this PEI sheet on my Prusa MK2 with over 2000 hours and the sheet is still in very good shape. No more small bubbles anymore that I often get using the cool plate stickers with this Gizmo pei.