<!DOCTYPE HTML> <input type="checkbox" style="border-width: 0"> <input type="checkbox" style="border-width: 1px"> <input type="checkbox" style="border-width: 2px"> <input type="checkbox" style="border-width: 3px"> <input type="checkbox" style="border-width: 4px"> <input type="checkbox" style="border-width: 5px"> <input type="checkbox" style="border-width: 6px"> <input type="checkbox" style="border-style: dotted"> <input type="checkbox" style="border-color: green"> <input type="checkbox" style="background-color: transparent"> <input type="checkbox" style="background-color: white"> <input type="checkbox" style="color: black"> <input type="checkbox" style="font-weight: normal">