I bought some blinds that were made to size and my measurement seems to be off by 1/8". The blinds themselves fit - albeit just barely - but with the mounting hardware they are too wide by about 1/8". Any ideas for inside mounting the blinds still but using mounting hardware that would attach at the top instead of the sides? They are fairly big and heavy horizontal blinds, 70" wide and 2.5" depth.

  • Can't you just trim the header bar so the brackets then fall within the correct width?
    – Tetsujin
    May 25, 2023 at 6:53
  • Did you ask the company who made them for you?
    – jay613
    May 25, 2023 at 9:51
  • Pics? Worst case, get a sanding block and sand 1/16" off the inside of the window frame where the mounts go.
    – Huesmann
    May 25, 2023 at 11:52
  • 1
    I would shorten the blinds. Sanding a dent into the woodwork is absolutely not the right way to do it.
    – isherwood
    May 25, 2023 at 13:05

1 Answer 1


You've asked an XY question, so I'll answer what you should've asked, which is how to resolve the problem so you can mount the blinds as intended.

You almost certainly have 1/8" of extra channel at one end or the other. Use a metal shears or hacksaw to shorten them that much, then mount per the instructions.

Protip: Install felt pads at the ends of the lower rails. They'll make operation smoother and prevent banging from wind, too.

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