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The largest skull is 475 mm, but the length of its canine teeth is unknown.
The largest available canine is over 150 mm, but the size of its skull is also unknown.
These two specimens lived in completely different period.
The famous holotype of the Beringian Cave lion from Bone Clones got its skull around 380 mm, and one of its upper canine teeth got 120 mm.
Proportionally speaking, the 475 mm skull should have 150 mm upper canine. However, different specimens can have different cranial morphology, some specimens with longer skull can have shorter canine teeth, and some others vice versa.