When it comes to choosing your snowboard size, weight is a far more important factor than height. If you choose a snowboard that you are too light for, you won't be able to flex the board whereas if you are too heavy for the snowboard, your board won't be stiff enough for your weight to be stabilized.
Does weight Affect snowboard size?
The length of your snowboard will vary depending on your body weight and the type of riding you plan to do. Back in the day, traditional snowboard sizing meant you stand next to the snowboard and if the top hits your chin, great, it fits!
Does snowboard size depend on height or weight?
This standard length is worked out based on your weight and height. Check out the post below which has length tables in it to help you determine your standard length plus more discussion on how to find the right length. Once you've found your standard length then: Take off 3 to 5cm if you are a beginner.