The following are printable sizing charts for boots. Its best to measure your foot at the end of the day (most swollen). If you are between two close sizes like a 8.5 and a 9- go with an 8.5 as the boots need to be snug as possible. Leather will stretch over time.

 

Riedell Sizing Chart:  http://www.rcsports.com/global/sizing-charts/RiedellSpeed.pdf

 

Pacer Sizing Chart:  http://www.rcsports.com/global/sizing-charts/Pacer.pdf

 

Sure-Grip/Rock Skate Sizing Chart:  http://www.rcsports.com/global/sizing-charts/SuregripRock.pdf

 

Vanilla Skate Sizing Chart:  http://www.rcsports.com/global/sizing-charts/Vanilla.pdf

 

Bont Boot Sizing:  http://www.bont.com/quad/items/sizes.html

 

If you decide to go the old-fashioned route and measure your foot- make sure its in the evening and that you are standing on the ruler to get the most accurate measurement.  To measure the width, use a tape measure and tape all the way areound the the widest part of you foot (just below your toes).