Standard window sizes
Standard window widths and heights for every common type.
Residential windows come in standard sizes from manufacturer catalogs. Use this page as a reference.
In this guide
- 1
Picture (fixed)
Width: 24-96 inches. 36, 48, 60, 72 are most common. Height: 24-96 inches. 36, 48, 60 are most common. Typical living-room: 60 × 48 or 72 × 60.
- 2
Double-hung
Width: 24-48 inches. Height: 36-72 inches. Common: 30 × 48, 30 × 60, 36 × 60.
- 3
Casement
Width: 18-36 inches (each; pairs 36-72 total). Height: 36-72 inches. Common: 24 × 48, 30 × 60.
- 4
Sliding (horizontal)
Width: 36-96 inches. Height: 24-60 inches. Common: 60 × 36, 72 × 48, 96 × 48.
- 5
Bay windows (overall)
Width: 60-120 inches. Height: 48-84 inches. Projection: 16-36 inches.
- 6
Transom
Width: matches door or window below. Height: 12-18 inches. Use: above doors or windows for borrowed daylight.
- 7
Egress (bedroom)
Minimum opening width: 20 inches. Minimum opening height: 24 inches. Minimum opening area: 5.7 sq ft (5.0 at grade level). Maximum sill height: 44 inches from floor. Check local code.
Frequently asked questions
What's the standard size of a bedroom window?
30-36 inches wide × 48-60 inches tall for double-hung; 60-72 × 36-48 for sliders. Must meet egress (~5.7 sq ft openable area).
What's the standard living room picture window size?
60 × 48 or 72 × 60 are most common.
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