Here are instructions for making a triple tier slider card (in metric measurements).
This is my first ever video tutorial, so please be kind.
Video features Triple Tier Slider Card, using the Best Catch stamp set.

https://youtu.be/WBZJ3ROQSjE

TRIPLE TIER SLIDER CARD

Whisper White
Tier 1      29.6 cm x 11 cm (score at 9.9 cm and 19.8 cm)
Tier 2      26 cm x 8 cm (score at 8.6 cm and 17.4 cm)
Tier 3       7.8 cm square

Balmy Blue Mats
Tier 1      10.6 cm x 9.5 cm
Tier 2       8.2 cm x 5.5 cm
Tier 3       7.2 cm x 5 cm

White Mats
Tier 2       7.8 cm x 5.1 cm
Tier 3       6.8 cm x 4.6 cm

Sliding Mechanisms
1.3 cm x 8.5 cm
1.3 cm x 7 cm

Cut slits for sliding mechanisms
Tier 1
Cut in 2.5 cm in from each side of the third section
Start cutting at 1.5 cm and stop cutting at 7.6 cm

Tier 2
Cut in 2.5 cm in from each side of the third section
Start cutting at 1 cm and stop cutting at 6.3 cm