I coul not find any petri dish racks that allow easy access to individual petri dishes without touching each other. This set contains the following maximum dish sizes:

• Ø 60mm x 16mm
• Ø 80mm x 16mm
• Ø 90mm x 16mm
• Ø 100mm x 16mm
• Ø 100mm x 21mm

This is untested, please give feedback before you give a star review.