Don't think so.
People don't realize just how disproportionately big these things are.
Let's use a little elementary grade math to change your perspective.
Length scales linearly, meaning 10" will obviously double 5", but not the same goes for thickness.
When we're talking of girth, size doesn't scale up linearly, but in terms of area.
Measure around a dick and you'll get an oval shape, but for the sake of convenience we can use π*r2 to get an educated guess of what we're talking about.
We'll convert and compare three different circumferences.
4.75" (average penis girth)
8" (soda can, also a fraction of a inch above largest penis girth ever recorded)
13.25" (XL Crackers seen here >>9435613
Also for reference, a baby's head is about 14" on average
the formula to use is
3.14159*(CIRCUMFERENCE*2.54/3.14159/2)^2 in order to convert to cm2
3.14159*(4.75*2.54/3.14159/2)^2 = 11.6cm2
3.14159*(8*2.54/3.14159/2)^2 = 32.8cm2
3.14159*(13.25*2.54/3.14159/2)^2 = 90cm2
This means the dildo is as thick as 8 normal dicks put together, and roughly triples a soda can.
By contrast >>9454743
's riding a Xar, which shaft is 10", much more moderate, but when you calculate the area:
3.14159*(10*2.54/3.14159/2)^2 = 51.3cm2
It still doesn't even come close to the biggest human penis to ever exist.
tl;dr Dragon dildos are insanely big and can't even compare to anything human, except maybe a leg or a baby