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Measuring Guide

Standard Windows - Recess Size

What youll need:

  • A metal tape measure
  • A pencil and paper

Measuring guidelines: Recess size is the option to choose when fitting the blind into the recess of your window. You don't need to make any deductions as we will do all that to ensure your blind fits perfectly. We accept sizes given in both centimetres and inches. If you are measuring in centimetres please measure to the nearest millimetre and to the nearest sixteenth of an inch if youre using inches. How to measure:

  • Measure the width and drop in three places and take the smallest size.
  • Don't make any allowances off either of the sizes as we will do that to ensure your blind fits correctly.
recess size

Standard Windows - ExactSize

What youll need:

  • A metal tape measure
  • A pencil and paper

Measuring guidelines: Exactsize is the option to choose when fitting the blind outside of the recess of your window. This means the window blind will overlap the window you are measuring. You can decide how much you want the blind to overlap on all four sides of the window and thats the measurement to use. Please note we will not make any deductions to these sizes. We accept sizes given in both centimetres and inches. If you are measuring in centimetres please measure to the nearest millimetre and to the nearest sixteenth of an inch if youre using inches. How to measure:

  • Measure the exact width and drop in three places of the area you wish to cover. (As a rough guide we recommend at least 70mm on the width to minimize light coming around the sides of the blind and the drop can be whatever you wish).
  • The sizes you give are the sizes we make the blind to, no deductions are made off an exact size.
exact size size

Measuring Guide -Square bay

What youll need:

  • A metal tape measure
  • A pencil and paper

Measuring guidelines: We accept sizes given in both centimetres and inches. If you are measuring in centimetres please measure to the nearest millimetre and to the nearest sixteenth of an inch if youre using inches. Below is a diagram of the most common way to install blinds into a square bay window with the largest blind running the maximum width of the largest window and then the two smaller side windows butting up to it. How to measure:

  • Firstly take the measurement of A from side to side and write it down as a recess size (we will work out the deductions for this blind).box bay sizes
  • For the second step, using a pencil mark the front edge of where the headrail would be when blind A was fitted. For this please see the table below as each product varies. Also be aware to take anything protruding from the window such as any handles or air vents.
Blind Type Headrail Depth
Aluminium Venetian (25mm slat) 3.5cm
Aluminium Venetian (50mm slat) 55mm
Pleated 21mm
Roller Blind 50mm (top fixing) 70mm (face fixing)
Roman Blind 40mm
Vertical Blind 80mm
Wooden Blind (25mm slat) 55mm
Wooden Blind (50mm slat) 70mm

Measuring Guide -Square Bay

What youll need:

  • A metal tape measure
  • A pencil and paper
  • A4 paper to use as a templates

Measuring guidelines: We accept sizes given in both centimetres and inches. If you are measuring in centimetres please measure to the nearest millimetre and to the nearest sixteenth of an inch if youre using inches. How to measure:

  • Create templates to help with the measuring of your angled bay window by folding an A4 sheet of paper to the headrail depth of the blinds you are measuring for. The template will be 30cm long by the depth of the blind you have chosen plus any obstructions. For example, when allowing 4cm for handles and choosing a 25mm venetian blind with a 3.5cm headrail, youd create a template 30cm by 7.5cm (4+ 3.5= 7.5cm). See the table below for headrail depths.
Blind Type Headrail Depth
Aluminium Venetian (25mm slat) 3.5cm
Aluminium Venetian (50mm slat) 55mm
Pleated 21mm
Roller Blind 50mm (top fixing) 70mm (face fixing)
Roman Blind 40mm
Vertical Blind 80mm
Wooden Blind (25mm slat) 55mm
Wooden Blind (50mm slat) 70mm
  • Place your templates in the left angle (between windows A & B), bring them together until the front corners of the paper templates meet and mark with a pencil points D & E. Then do the same on the right hand side angle bringing A & C together, mark each piece of paper and then label these F & G.
angled bay sizes
  • Measure between points D & F and write down as a recess measurement. Measure from point E to across window B and write down as a recess measurement. Measure from point G to across window C and write down as a recess measurement
  • The final step is to simply measure the drop (length) of the blind. This would be from the top of the window or recess to the sill.

Your now ready to head back over to www.revalux.co.uk to place your order.

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