Please can you tell me the distance between shelves?

It’s about 14 inches. There is a good amount of space

Would this work over a toilet without bottom 2 shelves??

Without the bottom 2 shelves, this should fit. The height of the 3rd shelf is about 29 inches, with width of 23 inches. I have a standard size toilet and these measurements seem work out. The 3rd shelf extends about 9 inches, so you may want to check and make sure that that the distance from the wall to the edge of the toilet lid (when in the open position) is a little greater than 9 inches to prevent the lid rubbing against bottom of 3rd shelf. But the unit is definitely sturdy enough to forego bottom shelves, and there are cross pieces in place that adjoin the two vertical panels to add to the stability. In short, I believe this would work.

User Manual Amazon Basics SH01-0608-008-SG-A05 Modern 5-Tie

Amazon Basics SH01-0608-008-SG-A05 Modern 5-Tier Ladder Bookshelf Organizer - Use Manual - Use Guide PDF.
Documents: Go to download!

Owner's manual - (English, French, Spanish, German, Dutch - Holland, Italian, Japanese)

Table of contents

Before First Use
Cleaning and Maintenance
Specifications

Before First Use

Check for transport damages.

DANGER: Risk of suffocation! Keep any packaging materials away from children - these materials are a potential source of danger, e.g. suffocation.

Cleaning and Maintenance

Cleaning

To clean, wipe with a soft, slightly moist cloth.
Never use corrosive detergents, wire brushes, abrasive scourers, metal or sharp utensils to clean the product.

Maintenance

Regularly check that all the components and fasteners (hardware) are tightened.
Store in a cool and dry place away from children and pets, ideally in original packaging.