Question About Physical Size Of Stamps

I got this stamp recently. Physically it is the largest stamp I have -- 50 x 100 mm. [For those who still think in English units that is right on 2"x4" ]. Is this the largest [physical size not monetary amount] postally usable stamp from any country? If not, could someone point me to bigger ones? Note: I tried to Google this but did not come up with an answer.

A contender

https://www.thefactsite.com/largest-postage-stamp/

Yes, but did they print more than once copy?
Was it available for purchase at the post office?
Was one ever actually used on cover?

9 years ago

https://goscf.com/t/14738

Postally useable is the key here. Ok

1911 China Express Letter stamps are large, if I recall correctly around 8" long?


Don

Thanks for the answers. I don't think there is a definitive answer out there and even if there was it would have to be updated over time.

I did find by searching SCF and following a link above some answers:

looks like a Mongolian stamp is the largest (I found): 5000T Peace MANDALA 185x140mm

The China stamp Don posted is one of series of Chinese Imperial multi-part stamps issued from 1905-12. They seem to all be 5 part stamps with only one part going on the actual mail piece and the other parts used as receipts to various parties. The one Don posted is missing the first two parts. Complete unused examples are quite valuable.

There is a $10 Canadian Whale stamp that is 130x50mm
There is a Yemeni Cats stamp that is 95x108mm but this may not be an "officially issued" stamp
There is a 2006 Tuvalu Rembrandt stamp 75x106mm
There is a Vietnamese stamp 90x120mm

One last one I found after initially posting this is a Dutch (Netherlands) "stamp." Not a single stamp but a single image spread over a whole sheet of stamps.

Probably others I have missed.

Images below

And here is what the pane of the Canadian whale stamp looks like. Quite impressive looking even if only a single is properly used on a commercial cover.

That is a very nice plate block!

I love the scuba divers on the selvage!

check this..
https://www.snupps.com/Exploring_St...in-thailand-

170mm stamp issued by Thailand..

Singapore had a 162mm stamp in 2011 on Significant Rivers Joint issue with Egypt.

soon a stamp with a light coloured corner for an address and flaps that can become an envelope...