This item fit 5mm-12mm(default sendding is 6mm)glass thickness. Before place the order ,Please Advice the glass thickness. They are made "oversized" at 0.7M (700mm) which means that they are longer than many existing Shower Door Seals and can be easily cut to size. Please measure the thickness of your glass. Simply remove your old seal from the glass, clean the glass and fit the new seal. For curved shower bath screens soak the seal in warm (not boiling water) to allow it to soften for 10 minutes then you can shape the seal to fit your screen.