These shoes should only be paired with jeans that fit you perfectly (a tad short on the legs). It should be their so it will be able to just fit over the ankle. Just like a high top sneaker (like Vans & Converse) these shoes should fit like those high top sneakers.
Sizing Chart (Foot Length cm/in)
Boot Type: Chelsea Boots Upper Material: Flock Boot Height: Ankle Closure Type: Slip-On Fit: Fits true to size, take your normal size Toe Shape: Pointed Toe Pattern Type: Solid Handmade: Yes Insole Material: PU Lining Material: Fleeces Outsole Material: Rubber Shaft Material: Flock Season: Spring/Autumn Heel Height: Low (1cm-3cm)