Helpful sizing tips:
Remove the shoe from your right, (or longest), foot. Measure with sock if you want space, no sock for a tighter fit. Place a blank sheet of paper against the wall and stand on it with your heel against the wall. Mark straight down from your longest toe on the paper. Measure from the edge of the paper against the wall to the line marked on the paper, (use cm/mm/in.) Use the sizing chart to match your measurement with an accurate size.
It is generally recommended that high-performance skaters go for a more snug (tighter) fit. Remember that leather boots will stretch and form to your foot over time, microfiber boots will hold true to size. For example, if your measurements are between a size 8 and 8.5, it would generally be recommended you go down to the size 8 in leather and give it some time to stretch for a better more secure fit in the long run. Toes should never be curled.
Atom/Jackson Quad Boot Size Chart
All Models -
Q6, Q4, F1, Competitor, Elite, Vantage, Supreme
Jackson Women's High Top Quad Boot Size Chart
Vista, Mystique, Finesse, Diva, EVO
Jackson Men's High Top Quad Boot Size Chart