Frame size of 250 and 450?

I'm 17 years old and weigh 140 lbs at a height of 5'11. I want to get a KTM 450 EXC, but I don't know if it is too big for me. I have heard that the Honda 250x, which is a perfect size for me, is the same frame size and the KTM 450EXC. All in all, is the 250x the same size as the 450EXC?

If you can put your feet flat on the ground then I would go for the KTM.

Its probs the same.

They're roughly the same. 125 / 250, 250F / 450. No big difference in size in any of them.

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