Sizing your Deeluxe Hardboot

Thanks for the video.
Note: The size table you were referring to, is missing below this video.

I have some older (1993) Raihle SNOWBOARDER boots that have a "9" on the inside of the boot lower, would this correspond to a UK 9 or a US 9?

My UPZ boot shell size is 299 mm, what is the same size as Deelux?

請問我想買deeluxe 這牌的單板鞋~如果我穿襪子腳長26~26.5公分～建議要買大一號27公分的嗎？