im about 5-7, 145 lbs, and have a 11.5 shoe size. ty

155 sounds good. with big feet like that you might want to go extra wide. depending on your riding style you might want to change the length a little. 155 would be good good for someone your weight in freestyle. l said that cause freestyles what l like to do. if you prefer to just cruise the mountain step it up to like a 160 or something close to that.

If you are a beginner, you need to find a board about your shoulder height to your chin height. Also with your big feet look for an extra wide board or at least one the does not let your toes hang off.

l am 5'7'' 140 lbs with a size 10.5 shoe. l have a 146 cm K2 board. It is the same board that l had 3 years ago, but l really like it. l do a lot of tricks & freestyle stuff, & a shorter board is really good for that. If l were u l would go with a 150 or 152 or something in that range. l am going to get a new board next year probably, & l will probably get a 152 or something. If u want more stability & control for just going down the hill, then a little bit longer board might be better.

short and wide. l wear a size 12 and have a wide board to prevent toe and heel drag. Wide boards are better in powder anyway.

Choosing the correct board length is not only influenced by ur height but also by ur WEIGHT. Keep in mind that a snowboard acts like a leaf spring - it has the slightest clue about how tall the person standing on it is. However, it does know ur weight.

Lighter people should have shorter, more flexible boards. Heavier people should have longer, less flexible boards. You will also need to determine what type (or style) of snowboarding u will be doing. freestylers ride a shorter board, whilst freeriders ride a longer board.

l am 5'7 161 lbs, & wear a size 7.5 US. l have a Burton 156cm. l think a 155cm board would be perfect for you, but whatever size u get, ensure u get a wider board than normal as u have a pretty big foot, sasquatch!

Good luck & enjoy whatever u get!

155-157

l would say a length of 150 - 153 cm and a width of 256 mm. l got these figures from Frosty Rider is snowboard size calculator at http://frostyrider.com/tips/size-guide.htm
It is hands down the best calculator on the web.