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Iowa: Sizes

 
DIMENSIONS
1911-15  4-5-digit        6"     x 15"

           6-digit        6"     x 15"     (1914)
           6-digit        6"     x 16 1/4" (1915)
1916-18  2-5-digit        6"     x 15"
         100000 - 199999  6"     x 16"
         200000 - 399999  6"     x 17"
1919                      5 1/2" x 15"
1920-21  4-5-digit        5 1/2" x 15"
           6-digit        5 1/2" x 16"

1922-25       5 1/2" x 15 1/2"
1926-29       5 5/8" x 15 1/2"        TAB DIMENSIONS
1930-55       5 1/2" x 12 5/8"        1948     1 3/4" x 2 1/2"
1956-present  6"     x 12"            1951-57  1 1/8" x 2 3/8"

WINDSHIELD STICKER DIMENSIONS    PLATE STICKER DIMENSIONS
1943  2 1/4"  x 3 1/2"           1973-97       1"      x 1 1/2"
1944                             1998          1 3/16" x 1 1/2"

                                 2007          1 1/4"  x 1 1/2"
1945  1 7/8"  x 7 1/2"           1995-98 COUNTY   3/4" x 2 1/4",
                                         3 7/8" or 5", depending
                                        on length of county name