Where the declaration is blown, embossed, or molded on a glass or plastic surface rather than by printing, typing, or coloring, the lettering sizes specified in paragraphs (i)(1) through (4) of this section shall be increased by one-sixteenth of an inch.
weight wt.
square sq.
fluid fl.
yard yd.
feet or foot ft.
inch in.
gallon gal.
quart qt.
pint pt.
ounce oz.
pound lb.
21 C.F.R. §701.13