my house is a few inches bigger on the inside

why is it bigger?

w̶̧̪͉͠ͅh̴͕͎̗̞̘̮͇̜̮̽̈́͛̉̐̚ẙ̷͚͖̼̯ ̶͚͓̻̬͔̀͗̌͛į̴͖͇͎͋͒̕ŝ̶̮̳̲̦̱̬̫̤͓ ̶̛̪̟̉̊̌̽̋̍̈́̕ĩ̴̳͕̭͓͇̹͖̪̝̔t̴͎͖͉̳̲͍͂̿͐ ̶̩̳̬͇̬̠̔̀͗́̀̄́́̕͠ͅb̷͙̝̗̟̤̣̤̬̮̉̈̈́̐͂́̊͒̚͠ì̷̢̛͕͖̰̻͆̿̈̌̿͂̉g̵̭͗͜ͅĝ̵̪̆͝e̴̝̖̓r̴͙͈̈́̊̎?̷̪̟͙̮̘̮̺̤̃͆̏͒̎̾͜