Hi there,
As a general rule (for cases, market sizing, fit questions, etc.) expect any and all!
You cannot memorize the world of casing/interviews. Learn how to learn. I.e. learn the skills/tools to react/adjust to any situation!
That being said, here are some useful resources for market sizing practice:
https://www.preplounge.com/en/management-consulting-cases?language=en&topic[]=2&sort=real-case-desc&page=1&perPage=20
https://www.preplounge.com/en/consulting-forum/market-sizing-6203
https://www.preplounge.com/en/consulting-forum/market-sizing-6720
https://www.preplounge.com/en/consulting-forum/market-sizing-4154
https://www.preplounge.com/en/consulting-forum/market-sizing-divorcesyear-4146
https://www.preplounge.com/en/consulting-forum/market-sizing-4241
https://www.preplounge.com/en/consulting-forum/i-came-across-market-sizing-case-the-question-is-how-many-freight-trucks-are-there-in-us-how-will-you-approach-it-6147