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Measuring for Bay Window Poles and Tracks

Measuring your bay window correctly is the first step to getting the right fit—whether you’re choosing a bay curtain pole or a track for your window. This clear, step-by-step guide is designed to make things easy, with helpful tips along the way. We’ve supported thousands of homeowners with their window projects, and we’re here to help you too. And if anything feels uncertain, our friendly team is always here to help by phone or Live Chat.

Tools You'll Need

Before You Begin: Key Tips

✓ Choose where you want the bay pole to finish:

  • Inside the bay (1): curtains follow the bay shape. You will see the edges of the curtains as you look into the bay,
  • Outside the bay (2): curtains hang in front of the bay. You will see the front of the curtains. This is the most common look, but may only be possible if there is a returning wall at the end of the bay.

❌ Do not measure around the window sill!

Measure exactly where you plan to install the pole or track. Heights can vary!

✓ You might need to include side wall sections (3) if:

  • They’re 25cm or longer OR
  • The window sill is deep (20cm or more) and curtains are full-length OR
  • Curtains can’t stack within the bay without blocking side light

✓ Double-check each measurement and write everything down.

✓ If the bay is wide or tall, have someone assist you.

✓ For wave headed or widely-spaced eyelet curtains, you will need extension brackets.

Measuring Bays for Poles or Tracks. Diagram
How to Measure Bay Sides for Curtain Pole or a Track. Diagram

How to Measure for a Bay Curtain Pole or Track

Follow these 4 simple steps to accurately measure your bay window for a curtain pole installation.

  1. Start from the Left Side

    Start at one end of the bay where the curtain track/ pole is to start (1). Measure the wall (A) where it meets at the angle of the next section of the wall (2).

  2. Move Across the Bay

    Then measure across to the next section of wall (B) to the next angle (3). Continue around the bay to where the pole or a track is to finish (4).

  3. Total It Up

    Add all three: A + B + C = Your Total Bay Pole Length

    Tip: If using curtain poles with finials, add the length of each finial to your total.

  4. If your pole or track extends out of the bay

    Follow the same principle as for 3-sided bay, but add 2 sides on the left and right.

    Note: we do not sell prepacked bay pole kits for this look, but please contact us and we will help you to build your own bay curtain pole set. Alternatively, use bendable tracks.

How to Measure for Bay Poles FAQ

Pencil pleat and pinch pleat curtain headings are the most compatible options for bay windows. These hook-based headings work perfectly with both bay poles and bay tracks, allowing curtains to glide smoothly around corners and operate efficiently. They provide maximum flexibility for bay window installations and ensure proper opening and closing functionality.

For bay tracks: Eyelet and tab top curtains are incompatible with curtain tracks because they cannot accommodate curtain hooks. Bay tracks only work with hook-compatible curtain headings like pencil pleat or pinch pleat styles.

For bay poles: Eyelet or tab top curtains don't work with standard bay curtain pole sets because these styles cannot pass over the support brackets that hold the pole in place. The curtains get stuck before reaching the bay corners and won't fully open or close properly. To use eyelet curtains on bay windows, you need a specially designed bay pole that avoids bracket obstruction, or hang separate curtains on each pole section (which reduces functionality).

For optimal bay window performance, choose hook-compatible headings like pencil pleat or pinch pleat curtains that work seamlessly with both bay poles and tracks.

Standard eyelet curtains don't work well on typical bay poles because they cannot pass over the support brackets. However, eyelet curtains can work on bay windows with specially designed poles, or by installing separate curtains on each section of the bay (though this reduces light and visibility when open). Visit our shop for bay poles for eyelet curtains.

When there's minimal space between your bay window and ceiling, first check the bracket depth of your chosen track or pole to ensure it fits the available space. If wall-mounted options won't work, consider ceiling-fix alternatives that mount directly to the ceiling rather than the wall. Ceiling-mounted bay tracks and poles can be ideal solutions for tight spaces and often provide a cleaner, more streamlined appearance while maximizing your window opening.


Read how our customer dressed her low ceiling bay - Holly's Smart Bay Window Solution.

For curtains weighing 15kg or more, first check that the wall above your bay can safely support the load. Brick or blockwork usually provides strong support, but plasterboard or hollow walls may need reinforcement or specialist fixings.

Most curtain poles and tracks kits include standard fixings suitable for wooden frames, but your wall type matters. Use appropriate wall plugs and heavy-duty screws for plasterboard, brick, concrete, or any other surface. For best results, consult your local hardware store to choose the right fixings for a secure, long-lasting installation.

Curtain length depends on personal preference, room design, and practical considerations.

  • Sill Length: Curtains hang just to the window sill — ideal for radiators or seating beneath windows.
  • Below Sill: Extends ~15–20cm below the sill for a fuller look.
  • Floor Length: Most popular and elegant, allowing curtains to drape or lightly touch the floor.

Always ensure consistency across all sections of the bay for a uniform appearance.

Not always. Many bay curtain pole kits are adjustable and designed to suit standard bay window shapes. However, if your bay has unusual angles, tight spaces, or you want a seamless look, a made-to-measure pole can give a neater finish and easier installation.

What's Next?

Now you know the measurements of your bay pole, explore our full range of bay pole kits designed for 3 and 5-sided bay window shapes or bendable tracks. Still not sure? Send us the image of your window and discover possible solutions for your bay — just reach out!

Learn More About Bay Poles