Legal Size Requirements for Red Flags.

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Canada

* 40cm or 400mm = 15.74"

	Province	Regulation
AB	Alberta	Red or orange, not less than 400mm square. Red or orange flag not less than 300mm (12") square for 1.5 meter (58.5") overhang. Pilot cars and escorts 400mm(16") square
BC	British Columbia	30cm (12") square or strips not more than 3cm( 1.18") wide, not less than 45cm (18") long, covering width not less than 15cm (6").
MB	Manitoba	Red flag not less than 30cm (12") square for 1 m overhang
NB	New Brunswick	Red or Orange 40cm (16") square. Rear overhang 1m(39"), overhang can only be 2m max.(6")
NL	Nfld & Labrador	Red or Orange 40cm (16") square
NT	NWT
NS	Nova Scotia	Red or orange at least 400mm(16") square
NU	Nunavut
ON	Ontario	Red or Orange not less than 40cm(16") square
PE	PEI	Red or Orange 40cm (16") square
PQ	Quebec	Red or orange 40cm(16") square on each side in at least two places if load extends more than 30cm (12") sideways. For 4m(13') rear overhang, every 2m (6.5') of length. As of Feb 1994 flags are replaced with amber flashing lights, 10cm diameter.
SK	Saskatchewan	Red or orange flag at least 30cm (12") square. 1m (39") rear overhang or 30cm (12") side overhang requires flags.
YT	Yukon

USA

	State	Regulation
AL	Alabama	Red flag 18" square
AK	Alaska	Red or Orange 16" square
AZ	Arizona	Red flag 12" square
AR	Arkansas	Red flag 18" square
CA	California	Red flag 16" square, 4' rear overhang
CO	Colorado
CT	Connecticut	Red flag 18" square
DE	Delaware
FL	Florida	Red or Orange fluorescent at least 12" square
GA	Georgia	Red flag 18" square all 4 corners
HI	Hawaii
ID	Idaho	Red or fluorescent orange 18" square
IL	Illinois	Red flag 18" square
IN	Indiana	2 Red or orange flags 18" square
IA	Iowa	Red or Orange fluorescent at least 18" square - each front corner and each rear corner.
KS	Kansas	Red or fluorescent orange 18" square
KY	Kentucky	Red or fluorescent orange 18" square on all four corners
LA	Louisiana	Red or fluorescent orange 18" square, all corners, 4' overhang, unless overhang is over 6', one flag for 3' overhang.
ME	Maine	Red or fluorescent orange 18" square on all four corners
MD	Maryland	Red or fluorescent orange 18" square on a staff. 2 red lights on rear overhang exceeding 4' and 1 on each side.
MA	Massachusetts	Red flag at least 12" square. Pilot cars need two 24" square red flags.
MI	Michigan	Red or fluorescent orange 18" square on all four corners
MN	Minnesota	Red, Yellow or Orange 18" square, exceeding 9' wide 75' long.
MS	Mississippi	Red flag 18" square
MO	Missouri	Red or fluorescent orange 18" square.
MT	Montana
NE	Nebraska	Red or fluorescent orange 18" square.
NV	Nevada	Red or fluorescent orange 18" square, rear overhang exceeding 4'
NH	New Hampshire	Red flag 12" square, rear overhang exceeding 4', one flag, if width exceeds 2', two flags.
NJ	New Jersey	Red flag 18" square all 4 corners
NM	New Mexico	Red, fluorescent red or orange not less than 12" square
NY	New York	Red or fluorescent orange 18" square, single flag for 2' wide rear overhang, 2 flags if exceeding 2'
NC	North Carolina	Red flag 18" square at widest point, mobile homes all 4 corners
ND	North Dakota	Red or bright orange not less than 12" square front and rear traffic side.
OH	Ohio	Red flag 18" square all 4 corners and extreme end of all protrusions
OK	Oklahoma	Red flag 12" square all 4 corners and extreme end of all protrusions, rear overhang 4'
OR	Oregon	Red flag 18" square all 4 corners
PA	Pennsylvania	Red or orange not less than 18" square, outermost points marked with red flag not less than 12"
RI	Rhode Island	Red or fluorescent orange 18" square, 4' rear overhang 2 flags
SC	South Carolina
SD	South Dakota	Red or orange 18" square all 4 corners
TN	Tennessee	Red flag 18" square top and bottom of widest point
TX	Texas	Red flag at least 12" square on extremities
UT	Utah	Red flag at least 12" square on 3' staff not less than 6' above road surface.
VT	Vermont	Red or fluorescent orange 18" square all 4 corners
VA	Virginia	Red or fluorescent orange 18" square all 4 corners
WA	Washington	Red flag at least 12" square all 4 corners
WV	West Virginia	Red flag 18" square
WI	Wisconsin	Red or orange 18" square
WY	Wyoming	Red or fluorescent orange 12" square

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