* Don't go by sizing charts.
- In some instances, there are just outright typos (e.g., in one chart, a size 8 boot had a longer blade length than a size 8.5 boot. Huh?)
- The Jackson blade sizing charts at one time had a cautionary footnote along the lines of, "This chart is provided for guidance only. To ensure proper blade length, always measure the length of the actual boot." In my instance, the chart gave a blade length that was 1/2" shorter than the outsole length. I just checked the latest Jackson chart. They've removed that caveat, and have a new footnote (see below). I like the old footnote better.
- Also, boot manufacturers tend to change their line more frequently than before. Sometimes these changes affect the length of the outsole, but there's a lag in updating their size charts. Also (at least for Jackson) sometimes they keep the same product designation when they update the boot. So if you're in the transition from previous model to new model, how do you know which one you have? So it's always best to have the boots in hand before deciding on blade length. I realize it's an annoyance if you have to wait to order the blades; but there's a lot at stake, so be patient.
- Blade length recommendation of 1/4" shorter than the outsole length used to be routine. But boots started getting substantially redesigned. In particular, the heel pitch on many boots have gotten larger, and outsoles on many boots have gotten trimmed. Some manufacturers still recommend 1/4" shorter; other manufacturers recommend full length; some leave it to personal preference (which probably covers it best). Jackson suggests 1/4" shorter, but adds: "If preference is other than suggested, please refer to the sole length and measure skater's sole to confirm blade fit." Edea used to recommend full length, but their latest guidance is: "Edea provide a suggested blade size chart but this is only a guide. Ask your coach if he/she has preferences."
- I couldn't find a similar recommendation for Risport, and I've never worn Risport. But here is an important factor to consider when choosing between 1/4" shorter and full length:
One major advantage of 1/4" shorter is that it allows you greater freedom in blade positioning and angular alignment. For me this is important because I need to mount the blade to the inside to compensate for strong pronation. Also, typically, the front tip of the sole plate is mounted flush with the front tip of the outsole. But as a matter of personal adjustment of the position of the drag pick and sweet spot, you might want to move the blade slightly forward or backward. For whatever reason, when changing the position and alignment of the blade, there's not an issue if the front of the sole plate extends slightly beyond the front of the outsole. But (for me, not everyone agrees) there is an issue if the side of the sole plate extends beyond the side of the outsole (other than at the very front) or the heel plate extends beyond the side or back of the heel. I personally would not care to fall and have the sole plate or heel plate dig into the ice. So, a 1/4" shorter gives you more mounting freedom than a full length.
But if you have a short outsole to begin with (due to high heel pitch or trimmed outsole, or both), and don't need a larger range of mounting freedom, go with a full length.
Hope this helps!