Are you not satisfied with your human-sized MATH hat? 3D print the iconic cap in all sizes so anyone or anything can represent Andrew Yang (who is running for president of the US. He'll give every 18+ US citizen $1000 every month for life, and that's just one of 150+ policies you can learn about at yang2020.com)
Small size has ~31mm inner diameter, available with a curved rim (supports required) or flat rim (no supports!)
Larger size has a 64mm inner diameter, also with two versions. For the larger flat rim version, use the 'thin' letters unless you want the text to really pop out.
Scaling up only is recommended for best results. If you do the MATH you can scale this for any sized head!