Measuring Shades and Blinds

When choosing custom shades or blinds, you’ll need to decide between inside mount and outside mount installations. Understanding the differences will help you choose the best fit for your window and the style you want to achieve.

Inside Mount (Recessed Installation)

Definition
Shades or blinds are installed inside the window frame, sitting flush within the recess for a clean, built-in look.

Key Features

  1. Sleek, minimal appearance
  2. Keeps window trim visible
  3. Requires sufficient frame depth

Best For

  1. A clean, tailored look
  2. Windows with 2.5" to 4" depth
  3. Pairing with outer drapery

Measuring Notes

  1. Measure the inside width at the top, middle, and bottom. Record the narrowest value.
  2. Subtract about ⅜" from the width to ensure smooth operation.
  3. Measure the inside height at the left, center, and right. Record the tallest value.

Minimum Depth Requirements

Shade Type Minimum Depth (inches)
Roman Shades 2.5
Bamboo Shades 2.75
Roller Shades 4
Zebra Shades 3
Cellular Shades 2.5
Venetian Blinds 3

Outside Mount (Frame or Wall Installation)

Definition
Shades or blinds are mounted outside the window frame, either on the wall or on the trim, extending beyond the window edges.

Key Features

  1. Makes windows appear larger
  2. Reduces side gaps and blocks more light
  3. Ideal for shallow frames or obstructions inside the recess

Best For

  1. Windows with less than 2" depth
  2. Maximizing light control and privacy
  3. Creating a layered or dramatic effect

How to Measure

Step 1: Width

  1. Measure from the outer edge of the left trim to the outer edge of the right trim.
  2. Add 0.5" for better coverage.
  3. Take three measurements (top, middle, bottom) and record the widest point.

Example
Measured width: 50"
Final width: 50.5"

Step 2: Height

  1. Measure from the top of the trim to the desired length (sill, apron, or floor).
  2. Add 3" for full coverage or floor-grazing style.

Example
Measured height: 40"
Final height: 43"

Tools Needed

  1. Steel tape measure
  2. Pen and paper or phone notes
  3. Step ladder (if needed)
  4. A helper (optional)

Shallow Windows

  1. If frame depth is less than 2", use outside mount.
  2. Measure width including mouldings and add 0.5".
  3. Measure height including mouldings and add 3".

Example
Width with moulding: 50" → Final width: 50.5"
Height: 40" → Final height: 43"

Still unsure?
Contact MorraHome customer support. We’re here to help you choose the right mount type and guide you through measuring.