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Best Lab Petri Dishes for Science Fair Projects (2026)

We ranked options by relevant diameters (60mm and 90mm), sterility, pack size/value, user rating, and suitability for student science fair protocols

This roundup covers lab petri dishes suited for school and science fair projects, focusing on size, sterility, and value for hands-on experiments. Picks were chosen by comparing dish diameter options (60mm and 90mm), pack sizes, sterile packaging, and overall user ratings to prioritize practical fit for student labs

Top Picks

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Buying Guide

Choose the right diameter

60mm dishes are compact and conserve media for small experiments, while 90mm dishes give more grow area and are better for colony isolation or larger samples

Sterile vs non-sterile

Sterile, individually packaged dishes reduce contamination risk for microbiology projects; non-sterile may be acceptable for simple plant or non-aseptic tasks

Consider pack size for project scope

Smaller packs (e.g., 100–200) suit single experiments or classrooms, while bulk packs (several hundred) lower per-dish cost for repeated trials or larger groups

Check lid fit and stackability

A snug lid minimizes contamination and moisture loss; stackable dishes save bench space during incubation and storage