We tried a selection of these boots and found the length of the boot to be true to the stated size. I’d advise you to choose the size you normally wear in women’s street shoes. The width is medium or C/D.

Cortech Adrenaline GP Boot for Women
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* Durable abrasion-resistant perforated Italian microfiber upper
* Contoured TPU shin plate for added support and impact resistance
* Billowed flex panels for added comfort and increased range of motion
* Ratcheting closure allows the rider to fine-tune the fit
* Generous outside YKK® zippered entry
* Exo-skeletal TPU torsional stiffener for added support
* TPU heel overlay and a TPU shifter guard
* Removable and replaceable TPU toe slider
* TechnoGI thermoplastic molded toe cap
* Dual density molded and contoured ankle protectors
* Steel shank midsole designed to withstands the pressure of high-speed racing
* Single density anti-slip and low-profile rubber sole
* Breathable mesh lining
* Removable and replaceable insole