Free shipping within the US · Free Gap Check Card

Gap Check Card

A free paper gauge you print at home. Slide it into your gap to read the width in a few spots along the seat. Marked from 1/4 inch to 3-1/2 inches.

How to use it: check 3 to 5 spots

A gap is almost never the same width all the way along, so one reading won't tell you much. Check it at the seat-back end, the middle and the buckle end. If it looks uneven, add a couple more spots in between.

Step-by-step guide: take 3 to 5 readings along the car seat gap with the Gap Check Card, from the seat back down to the buckle
Take 3 to 5 readings from the seat back to the buckle.
For the best reading
  • Leave the seat in your normal driving position.
  • Slide the card in point first until it stops. Don't force it.
  • Read the mark that lines up with the edges of the gap and write it down for each spot.
What the numbers tell you

These are just the width of your gap at each spot. They don't promise that any product will fit. If you want a second opinion, send us your readings and your car through the contact form and we'll tell you straight whether the 2-pack looks right. The photo measuring tool is another way to see the shape of your gap.

✂ Cut along the dashed lineCar Seat Gap Check CardMeasure your gap before you buy · carseatgapfiller.com3.5″ (89 mm)3.0″ (76 mm)2.5″ (64 mm)2.0″ (51 mm)1.5″ (38 mm)1.25″ (32 mm)1.0″ (25 mm)¾″ (19 mm)½″ (13 mm)¼″ (6 mm)Total length6″ (152 mm)012345Print at 100% scale (do not resize). This ruler must measure 5 inches; if it doesn’t, print again at “Actual size”.

Print and cut your Gap Check Card

  1. Print this page at 100% scale (“Actual size”, not “Fit to page”) on letter or A4 paper. Card stock works best.
  2. Hold a real ruler up to the 5 inch ruler at the bottom. If it's off, print again.
  3. Cut along the dashed line.
  4. Use it at 3 to 5 spots as shown above.

Each bar is drawn to its labeled width at the white center line, so the card reads true at 100% scale. Expect readings to be off by about 1/8 inch, depending on your printer and how neatly you cut it.

Check fitBuy the pair $24.95