It is a standalone tag, does not surround anything, and there is no terminating tag. Checkbox specifies a single toggle button that is on or off. NAME specifies the symbolic name, not the displayed name, for the input field. This must be specified for all types except submit and reset. The NAME attribute is used when putting together the query string when submit is selected.
SIZE specifies the size of the text and password input field in characters.
The default is 20. The default is unlimited characters. SIZE specifies the number of items in the list. The value of SIZE determines how many items are visible. Depending on which one you specified as your method, you receive the information in different ways.