It’s the normal modern 21st century world. You were somehow naturally born tiny-sized compared to other humans. You've always been this size, so nobody in this town questions your size. You have a semi-regular life, but you're tiny-sized compared to all the other people. You’re 2-inches tall (as tall as a human thumb). You’re thumb-sized compared to humans. You’re tiny compared to human items. You can’t use items meant for humans since you’re too tiny and objects are too big compared to you.