Check paper size message even though paper size is correct

Might be page size mis match> Check paper size in system as well as in printer.> Remove tray &check for paper size.> Clean paper path sensors.

Check paper size refers to the fact your documents are for say and A4 sheet of paper but your drivers properties are set to letter size. Go into the drivers printing preferences and set the paper size to the correct value. All should work fine now.

MY HP DESKJET 1280 CANNOT PRINT PHOTOS ON A3 PHOTO CARD

this printer have the option to change the size of paper(the standard long of sheet are 11 inchs, maybe are in 12 or 13), check in you user manual, the size have by default , and if dont the same media size change to the correct size

Hi manitou344:
Here is some info that might help you.

Table 1-8. Tray 1 paper sizes1
Media Dimensions Weight or thickness Capacity
Minimum size paper 76 by 127 mm
(3 by 5 in)
60 to 163 g/m2
(16 to 43 lb bond)
100 sheets
(75 g/m2; 20 lb bond)
Maximum size paper 216 by 356 mm
(8.5 by 14 in)
60 to 163 g/m2
(16 to 43 lb bond)
100 sheets
(75 g/m2; 20 lb bond)
Minimum size glossy
paper
76 by 127 mm
(3 by 5 in)
75 to 120 g/m2
(20 to 32 lb bond)
Maximum stack
height: 12 mm (0.47 in)
Maximum size glossy
paper
216 by 356 mm
(8.5 by 14 in)
75 to 120 g/m2
(20 to 32 lb bond)
Maximum stack
height: 12 mm (0.47 in)
Minimum size
transparencies2
76 by 127 mm
(3 by 5 in)
0.12 to 0.13 mm thick
(4.7 to 5 mils thick)
50 sheets
Maximum size
transparencies2
216 by 356 mm
(8.5 by 14 in)
0.12 to 0.13 mm thick
(4.7 to 5 mils thick)
50 sheets
Minimum size
envelopes
76 by 127 mm
(3 by 5 in)
60 to 90 g/m2
(16 to 24 lb bond)
10 sheets
Maximum size
envelopes
216 by 356 mm
(8.5 by 14 in)
60 to 90 g/m2
(16 to 24 lb bond)
10 sheets
Minimum size label 76 by 127 mm
(3 by 5 in)
75 to 163 g/m2
(20 to 43 lb bond)
50 sheets
Maximum size label 216 by 356 mm
(8.5 by 14 in)
75 to 163 g/m2
(20 to 43 lb bond)
50 sheets
Minimum size
cardstock
76 by 127 mm
(3 by 5 in)
135 to 216 g/m2
(43 to 43 lb bond)
50 sheets
Maximum size
cardstock
216 by 356 mm
(8.5 by 14 in)
135 to 216 g/m2
(43 to 43 lb bond)
50 sheets
This printer can
detect transparencies that were not designed for use with HP Color LaserJet printers.

There is a workaround for this problem by tricking the printer.
The paper sensor, on my printer model hp4500 seems to only sense the paper at the beggining of the print job.
What I did to trick the printer to print on odd size paper is slide the paper adjuster to 8.5 and put a regular white sheet in. Then put your odd size paper under it. When you print your document set the number of copies to 2 and print. The printer is going to sense that the paper is correct, and start the job.
Here is the tricky part... once the first 8.5x11 sheet is almost all the way through quickly slide the paper adjuster over to match the size of your odd width paper. The printer should pick up the odd paper and print the second copy. Fool you printa! You should be able to do batches of odd paper size under the first 8.5X11. I hope this helps.
Deny

I got around this problem by tricking the printer. The paper sensor, on my printer model hp4500 seems to only sense the paper at the beggining of the print job. What I did to trick the printer to print on odd size paper is slide the paper adjuster to 8.5 and put a regular white sheet in. Then put your odd size paper under it. When you print your document set the number of copies to 2 and print. The printer is going to sense that the paper is correct, and start the job. Here is the tricky part... one the first 8.5x11 sheet is almost all the way through quickly slide the paper adjuster over to match the size of your odd width paper. The printer should pick up the odd paper and print the second copy. Fool you printa! You should be able to do batches of odd paper size under the first 8.5X11 I hope this helps.
Deny When the 8.5x11

There is a workaround for this problem by tricking the printer.
The paper sensor, on my printer model hp4500 seems to only sense the paper at the beggining of the print job.
What I did to trick the printer to print on odd size paper is slide the paper adjuster to 8.5 and put a regular white sheet in. Then put your odd size paper under it. When you print your document set the number of copies to 2 and print. The printer is going to sense that the paper is correct, and start the job.
Here is the tricky part... once the first 8.5x11 sheet is almost all the way through quickly slide the paper adjuster over to match the size of your odd width paper. The printer should pick up the odd paper and print the second copy. Fool you printa! You should be able to do batches of odd paper size under the first 8.5X11. I hope this helps.
Deny

There is a workaround for this problem by tricking the printer.
The paper sensor, on my printer model hp4500 seems to only sense the paper at the beggining of the print job.
What I did to trick the printer to print on odd size paper is slide the paper adjuster to 8.5 and put a regular white sheet in. Then put your odd size paper under it. When you print your document set the number of copies to 2 and print. The printer is going to sense that the paper is correct, and start the job.
Here is the tricky part... once the first 8.5x11 sheet is almost all the way through quickly slide the paper adjuster over to match the size of your odd width paper. The printer should pick up the odd paper and print the second copy. Fool you printa! You should be able to do batches of odd paper size under the first 8.5X11. I hope this helps.
Deny

Check printer properties and make sure you have specified the correct paper size.