Direct from the Canada Post website, and to be released on July 7:
"This booklet of 10 PermanentTM domestic rate stamps is offered to our customers as a means of supporting humanitarian aid in Ukraine. A donation of $1 from each booklet of 10 stamps will go directly to the Canada-Ukraine Foundation.
The stamp features a sunflower – the national flower of Ukraine. It has become a symbol of peace and unity. The bright yellow flower, which has deep meaning for Ukrainians, can be seen throughout the country, including as adornment in the vinok, the traditional floral headdress. The yellow sunflower is shown against a blue-sky background, reflecting the country’s flag colours of yellow and blue.
This semi-postal fundraising issue offers Canadians an opportunity to support Ukrainians affected by the current humanitarian crisis.
Canada and Ukraine share a historic bond. The first wave of Ukrainian immigrants began to arrive in the 1890s, and Canada was the first Western country to recognize Ukraine’s independence in 1991. Today, nearly four per cent of Canadians can trace their roots to Ukraine."
Thank you!! It went pretty well, but I’m definitely glad to be done. Especially with all the lovely new stamps coming out this summer, I’m excited to have more time for Postcrossing
@Nique … Wish they also issued US and international denominations. But, of course, these stamps come from the occasional community charity series, so those are, I think, always domestic rates.
Can someone explain the +10. I know that they cost more because a donation is being made with the purchase. However, if you use a single stamp, is it worth 92 cents or $1.02?
I would think so too. However, why would the +10 be written right on the stamp, which is currency if that wasn’t part of the face value. In 50 years, how will anyone know that it’s an imaginary 10 cents?
As @aegisW already answered, it is common way to publish a charity stamp.
For example this is the first ever Finnish charity stamp - issued on May 1922.
This is a bit different to the Canadian one as we can see M and P which mean currencies of that time (markka and penni). But these ones from 1938 doesn’t show them as the Canadian one doesn’t either.
I have no doubt you are correct. I just find it a confusing way to indicate that proceeds went to charity as they have indeed included it in the face value when that isn’t the actual face value.
This is sooo beautiful! 
