I just purchased 6 internal venetian blinds for my motorhome. I measured the windows myself using the guideline supplied by Veneta. When I received them I was very happy with the packing of the blinds as there was no damage to them at all. I installed the blinds myself without any problems using the supplied guide again from Veneta, all blinds fitted perfectly and look great. To wrap up the blinds were value for money and would not hesitate in recommending to others.