Shelves, by size
Twenty-nine shelves, 460 Splashes, each shelf where it sits on the ruler: smallest at the left, biggest at the right.

Atoms9200 pm to 5 nm
Tiny World238.4 nm to 5 mm
Imaging6100 µm to 2 m
Gems86.5 mm to 30 cm
Studio231 cm to 25 cm
Balls251.6 cm to 40 cm
Food282 cm to 40 cm
Toys161.6 cm to 80 cm
Animals137 mm to 2.4 m
Body72 cm to 1.7 m
Clothing414 cm to 70 cm
Everyday Things1312.2 cm to 1 m
Pictures and Pages624 cm to 60 cm
Music912 cm to 2.4 m
Photoreal799 mm to 100 m
AI and Computing1734 cm to 3.4 m
Medieval1010 cm to 12 m
Nature236 cm to 25 m
Holidays85.5 cm to 100 m
Vehicles141.8 m to 250 m
Weather & Fire1315 cm to 10 km
Landmarks1625 m to 1.1 km
Earth and Maps81 km to 12,756 km
Science912 nm to 100 thousand light-years
Space371 mm to 100 thousand light-years
Math18No size
Lab3No size
Shapes3No size
Arcade12No size