tinymce change table width from class list option code example
Example: tinymce adding tbale buttons
tinymce.init({
plugins: "table",
menubar: "table",
toolbar: "table tabledelete | tableprops tablerowprops tablecellprops | tableinsertrowbefore tableinsertrowafter tabledeleterow | tableinsertcolbefore tableinsertcolafter tabledeletecol"
});