1
What shape is your bay?
Square bay (90°) The side windows are at right angles to the middle window
Splay bay (135°) The side windows angle outwards from the middle window
?°
Another angle Any other angle, or a bay with more than three windows
How would you like to measure?
Follow our measuring guide Recommended. Works for any angle and any number of windows – you’ll just need a tape measure, ruler, pencil and two sheets of paper.
I know the exact angle Enter the angle and we’ll work out the sizes for a three-window bay.
Not sure? Most bay windows are either square (90°) or splayed (135°).
2
Which blinds are you ordering?
Blind type
How will you fit them?
Inside the recess Brackets screwed into the top of the window recess (top fix)
On the wall or frame Brackets screwed onto the face of the wall or window frame (face fix)
3
Do your window handles stick out?
No Nothing sticks out where the blinds will hang
Yes The handles stick out from the window frame
5
How should the blinds meet in the corners?
2
Work out your total depth
Tape measure
Ruler
Pencil
2 sheets of paper
Each blind sits on a headrail. Its depth, plus anything sticking out of the window frame, tells you where your blinds will meet in the corners.
Blind type
Fitting Inside the recess (top fix) On the wall or frame (face fix)
Widest blind Up to 200cm wide Over 200cm wide
Choose your blind type and enter the obstruction depth –
3
Find where your blinds meet
A Mark your total depth on paper
Place your two sheets of paper side by side, with their top edges lined up.
Measure your total depth down from the top edge and draw a line across both sheets.
B Find the first measuring point
Lay the sheets flat on the sill, one against each window at a corner, with the top edges pressed against the frame.
Slide them together until the two lines meet.
Mark the sill where the lines meet, and mark the frame where the sheets meet it.
C Mark every corner
Repeat at each corner of the bay.
Decide where the blinds should end at each side – this is up to you, or may be set by obstructions – and mark these end points on the frame.
You need one blind for every window. A five-window bay needs five measurements and five blinds.
I’ve marked every corner and both end points
4
Measure the widths and drop
Windows in your bay
− 3 +
Measure between your marks for each window, from left to right.
Measure the drop of each window on the left, in the centre and on the right, and use the smallest.
All windows have the same drop
0 of 5 steps done See your sizes ↓