What are the deductions from recess size to blind size for your roller blinds/cassette blinds?

R20 recess size width minus 2mm = blind size width minus 37mm = fabric width 

R20B recess size width minus 2mm = blind size width minus 37mm = fabric width 

R20C recess size width minus 9mm = blind size width minus 43mm = fabric width 

R20D recess size width minus 2mm = blind size width minus 37mm = fabric width 

R20M recess size width minus 2mm = blind size width minus 37mm = fabric width 

R20S recess size width minus 6mm = blind size width minus 20mm = fabric width 

R20W recess size width minus 2mm = blind size width minus 38mm = fabric width 

R26 recess size width minus 6mm = blind size width minus 20mm = fabric width 

R40-36 recess size width minus 6mm = blind size width minus 40mm = fabric width 

R40-53 recess size width minus 6mm = blind size width minus 45mm = fabric width 

R40-70 recess size width minus 6mm = blind size width minus 45mm = fabric width 

R54 recess size width minus 2mm = blind size width minus 52mm = fabric width 

R55 recess size width minus 2mm = blind size width minus 45mm = fabric width 

R56 recess size width minus 2mm = blind size width minus 50mm = fabric width 

R57 recess size width minus 2mm = blind size width minus 55mm = fabric width 

C20-60 recess size width minus 3mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C20-90 recess size width minus 3mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C20-120 recess size width minus 3mm & drop minus 2mm = Blind size minus 49mm = fabric width 

C22-60 recess size width minus 3mm & drop minus 2mm = Blind size minus 52mm = fabric width 

C24-90 recess size width minus 3mm & drop minus 2mm = Blind size minus 45mm = fabric width 

C24-120 recess size width minus 3mm & drop minus 2mm = Blind size minus 45mm = fabric width 

C25-60 recess size width minus 3mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C25-90 recess size width minus 3mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C27-120 recess size width minus 3mm & drop minus 2mm = Blind size minus 46mm = fabric width 

C29-60 recess size width minus 3mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C29-90 recess size width minus 3mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C40-60 recess size width minus 2mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C40-90 recess size width minus 2mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C40-120 recess size width minus 2mm & drop minus 2mm = Blind size. minus 49mm = fabric width 

C42-60 recess size width minus 2mm & drop minus 2mm = Blind size. minus 52mm = fabric width 

C44-90 recess size width minus 2mm & drop minus 2mm = Blind size. minus 45mm = fabric width 

C44-120 recess size width minus 2mm & drop minus 2mm = Blind size minus 45mm = fabric width 

C45-60 recess size width minus 2mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C45-90 recess size width minus 2mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C47-90 recess size width minus 2mm & drop minus 2mm = Blind size minus 46mm = fabric width 

C47-120 recess size width minus 2mm & drop minus 2mm = Blind size minus 46mm = fabric width 

C49-60 recess size width minus 2mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C49-90 recess size width minus 2mm & drop minus 2mm = Blind size minus 43mm = fabric width 

C40-60T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C40-90T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C40-120T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C44-90T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C44-120T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C45-60T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C45-90T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C47-90T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C47-120T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C49-60T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C49-90T recess size width minus 2mm & drop minus 2mm = Blind size minus 79mm = fabric width 

C56-90T recess size width minus 2mm & drop minus 2mm = Blind size minus 89mm = fabric width 

C56-120T recess size width minus 2mm & drop minus 2mm = Blind size minus 89mm = fabric width 

C56-90TS recess size width minus 14mm & drop minus 14mm = Blind size minus 89mm = fabric width 

C56-120TS recess size width minus 14mm & drop minus 14mm = Blind size minus 89mm = fabric width 

C57-90T recess size width minus 2mm & drop minus 2mm = Blind size minus 89mm = fabric width 

C57-120T recess size width minus 2mm & drop minus 2mm = Blind size minus 89mm = fabric width 

C57-90TS recess size width minus 14mm & drop minus 14mm = Blind size minus 89mm = fabric width 

C57-120TS recess size width minus 14mm & drop minus 14mm = Blind size minus 89mm = fabric width