Photo below is from Chicago.
But This photo shows you both sizes of 1960's
type shelter signs
Wayne County Building
Shelter sign is barely visiable just above
doorway under the stairs
Protesters walk by Detroit Police HQ's Shelter Sign
Protesters walk by a Shelter Sign on the
Federal Court Building in Downtown Detroit.
Marquette Building, Downtown Detroit, Shelter sign
just right of doorway
Redeemer Church, Detroit
Eastern High School
Fallout Shelter sign reflecting in the
camera flash just left of the entrance
Centerline High School Dance 1950's
you look in the Background just left of the doorway
there is a large S Shelter sign on the wall.
City Of Royal Oak.
Shelter sign on right side of entrance
Detroit School, Name Unknown
at this time.
Fallout shelter sign by doorway
1950's Shelter Sign being installed in front of Penobscot
2 Fallout shelter signs on Lightpoles
Renaissance High School, Detroit
Sign Next To Doorway
Roosevelt High School,
Shelter Supplies being stocked into shelter area
Fallout Shelter Supplies
In underground delivery area
Northland Center Mall, Southfield, Oakland
A view down Griswold,
At least 3 Fallout Shelters signs seen on Lightpoles.