Simple example: X{{su2|p=a}}X{{su2|b=b}}X{{su2|p=a|b=b}}X
Left aligned (default): X{{su2|p=aaaaa|b=b}}X{{su2|p=a|b=bbbbb}}X
Right aligned: X{{su2|a=r|p=aaaaa|b=b}}X{{su2|a=r|p=a|b=bbbbb}}X
Center aligned: X{{su2|a=c|p=aaaaa|b=b}}X{{su2|a=c|p=a|b=bbbbb}}X
Smaller font: <small>X{{su2|p=a}}X{{su2|b=b}}X{{su2|p=a|b=b}}X</small>
Larger font: <big>X{{su2|p=a}}X{{su2|b=b}}X{{su2|p=a|b=b}}X</big>
Fixed width:
X{{su2|p=...|b=www}}X{{su2|w=f|p=...|b=www}}X