Advent calendars I made for my 3 youngest grandchildren. I wish I'd never started! One was enough!!!
Cayden's was made after I'd made the other two quite some time, so I forgot the measuremeants and this one ended up being about an inch bigger than Justin's at 16" x 16".
Mandy thought Amelia's was too small to fit anything of any value in so I adapted the sizing to accommodate her wishes (LOL) and made this one 15" x 15".
This was the first advent calendar I made using the original Kathy Orta dimensions 12x12.