PORCELAIN PLATES.NET
A Website for Porcelain License Plate Collectors & Enthusiasts
Gallery: Size Variations
LONGEST
In the world of porcelain license plates, most plates were manufactured on bases
no longer than about a foot.  However, there are definite exceptions to this rule.  
Some plates, like the California 1914 & 1915 and some of the later Massachusetts
plates reached a relatively impressive 16 inches in length.  However, there are
only seven porcelain varieties ever produced that reached the 17 inch mark.
Standard Long California "Dogbone" Pre-State
SMALLEST
By rule, porcelain license plates were usually on the larger side, as the intent was
for them to be seen by police officers.  However, there are quite a few very small
plates that were manufactured in the porcelain era.  Some of these were quite
small indeed, measuring fewer than 20 square inches.  However, there are only
six porcelain varieties ever produced that were a mere 15 square inches or less.
Lake, FL 1915-1917
2-digit Manitoba 1912-13 MC
Wheeling, WV 1915 MC
Five-Character 1910-1913 Connecticut
Six-Character 1910-1913 Connecticut
Schenectady(?), NY 1908 Scavenger License
Lipped Long California "Dogbone" Pre-State
24
inches long
17 3/4
inches long
19
inches long
20
inches long
23 1/2
inches long
Six-Tiled Texas Pre-State "Kit Plate"
17
inches long
1909 Connecticut "Block C"
18 1/2
inches long
Mt. Kisco, NY 1920
Michigan 1910-1914 MC
University City, MO 1917
2 1/2" x 4"
(10 square in.)
2 1/2" x 6"
(15 square in.)
2 1/2" x 6"
(15 square in.)
2 1/2" x 4 1/2"
(11.25 square in.)
2 1/2" x 4"
(10 square in.)
2" x 5"
(10 square in.)
BIGGEST
In the early days of license plates, finicky car owners objected to the perceived
disfigurement of their cars caused by the placement of plates on them.  
Thankfully, most plates were not too objectionable and were of a manageable
size.  However, there are five notable porcelain exceptions in which the size of
the plate exceeded 100 square inches.
Muskogee, OK 1911-13
7 1/2" x 15 3/4"
(118 square in.)
5 1/2" x 18 1/2"
(102 square in.)
5 1/2" x 19"
(105 square in.)
7 1/2" x 14"
(105 square in.)
8 1/2" x 14"
(116 square in.)
Prescott, AZ
McPherson, KS (Type 1)
Six-Character 1910-1913 Connecticut
1909 Connecticut "Block C"