Rich, the black Smica (unknown) stem seems to fit my 25.4 risers fine. It is 110mm long and will be angled to be nearly flat. They are for 1 1/8 steerers. The Bigfoot one has quite a sharp rise on it due to it being a mtb stem. Length wise, it's up to you, what's your current length one? Risers will be higher than drops/flat bars so you can use a slightly longer one as the rise brings the bars close to you.
Rich, the black Smica (unknown) stem seems to fit my 25.4 risers fine. It is 110mm long and will be angled to be nearly flat. They are for 1 1/8 steerers. The Bigfoot one has quite a sharp rise on it due to it being a mtb stem. Length wise, it's up to you, what's your current length one? Risers will be higher than drops/flat bars so you can use a slightly longer one as the rise brings the bars close to you.