Foot Length: Standard
Width: Standard
Instep: Standard (adjustable)

Model Features: Velcro strap closure
Materials: Leather

The instep strap allows for fine adjustments to the fit. In this season’s model, the instep design has been refined to provide improved stability. We generally recommend choosing your regular size; however, if you have low-volume feet, you may consider sizing down to prevent slipping.

Foot Length: Standard
Width: Standard
Instep: Slightly low (adjustable)

Model Features: Two-step snap button strap
Materials: Suede

The snap button strap allows for two levels of fit adjustment. As the strap length is designed for a close fit, we recommend sizing up if you have a higher instep.

This model is designed to be worn both barefoot and with socks. We recommend selecting the most suitable size based on your preferred style and wearing conditions.

Foot Length: Standard to slightly long
Width: Standard
Instep: Standard (adjustable)

Model Features: Magnetic buckle closure
Materials: Leather / Neoprene

The magnetic buckle allows for quick and easy on and off, while the side straps enable fine adjustments for a secure fit. Designed to be worn both barefoot and with socks depending on the season or occasion, we recommend selecting the most suitable size based on your preferred style and wearing conditions.

Foot Length: Standard
Width: Standard to slightly narrow
Instep: Standard

Model Features: Heel strap
Materials: Cow leather / Synthetic fiber

The heel strap features two snap buttons, allowing for three levels of size adjustment. Designed to provide a secure and comfortable fit, whether worn with socks or barefoot.

Foot Length: Normal
Foot Width: Normal to slightly wide
Instep: Normal (adjustable)

Model Feature: Laces
Material: Cow leather / Cotton canvas

The lace system is designed to tighten from the lower section, allowing adjustable fit that conforms closely to the entire foot. It enables a refined, personalized fit based on individual foot shape, delivering a stable and secure wearing experience.

Foot Length: Normal
Foot Width: Normal
Instep: Slightly low (non-adjustable)

Model Feature: Velcro strap
Material: Cow leather / synthetic fibers

The strap features a non-adjustable design, which may result in a tighter fit for customers with a higher instep.

Foot Length: Normal
Foot Width: Normal
Instep: Normal

Model Feature: Laces
Material: Cow leather / Pig leather

Due to the characteristics of the sole, this model has a relatively small fit. Customers with wider feet or a higher instep are advised to consider sizing up by 1–2 sizes.

Foot Length: Normal
Foot Width: Normal
Instep: Normal

Model Feature: Laces
Material: Steer leather / Pigskin

This model features the largest volume in OAO’s history, equipped with a new VIBRAM® sole that achieves a high level of softness, durability, and forward propulsion in a single design.

Foot Length: Normal
Foot Width: Narrow
Instep: Low

Model Feature: YKK zipper system
Material: Synthetic leather / Nylon / Synthetic fibers

If you are unsure between two sizes, we recommend choosing the larger size. For customers with a higher instep, we also suggest considering an even larger size for a more comfortable fit.

Foot Length: Normal
Foot Width: Normal
Instep: Normal

Model Feature: Laces
Material: Grained leather / Synthetic fibers

The first original sole developed by OAO is designed to go beyond gravity, resonating with Zaha’s philosophy of pursuing a new architectural vision. Its futuristic form was created as a new symbol of OAO.

Foot Length: Normal
Foot Width: Slightly narrow
Instep: Slightly low

Model Feature: Low-cut side gore
Material: Steer leather / Pigskin

This low-cut side gore boot is individually produced in Japan. It combines easy on-and-off wear with a secure, close fit, while maintaining the refined, substantial presence characteristic of leather boots.

Foot Length: Normal
Foot Width: Normal
Instep: Slightly low to normal

Model Feature: Slip-on
Material: Cow leather / Pigskin

The lightweight rubber sole with a subtle heel creates a compact silhouette, making this model suitable not only for outdoor use but also ideal as a lounge shoe for indoor wear.

Foot Length: Standard
Width: Standard to slightly narrow
Instep: Standard (adjustable)

Model Features: Lace-up closure
Materials: Synthetic leather / Canvas

Due to the slightly tapered silhouette toward the toe, we recommend sizing up if you have wider feet. If there is extra room in length, the fit can be adjusted with an insole. The lace-up design allows for precise adjustment of the fit.

Foot Length: Standard
Width: Standard to slightly wide
Instep: Slightly high (adjustable)

Model Features: Cord stopper closure
Materials: Nubuck / Synthetic leather

Compared to lace-up styles, this model is designed with a slightly roomier fit around the instep and width. We recommend choosing a size that provides a secure, close fit. If you have a lower instep or narrower feet, you may also consider sizing down.

Foot Length: Standard
Width: Standard
Instep: Slightly low

Model Features: Side gore boots
Materials: Leather

Crafted entirely from leather, this model will gradually conform to your foot over time, developing a natural, comfortable fit. Due to the side gore construction, the fit around the instep cannot be adjusted. The opening and instep are designed slightly lower, but will soften and adapt with wear. We recommend choosing your regular size.

Foot Length: Standard
Width: Standard
Instep: Slightly low

Model Features: Zip closure
Materials: Leather

The zip construction provides a secure hold across the instep. If you have a higher instep, we recommend sizing up. Even with additional room in the toe area, the firm hold at the instep helps maintain a stable and comfortable fit.

Foot Length: Normal
Foot Width: Normal
Instep: Slightly low

Model Feature: Zipper Type
Material: Waterproof oiled leather (cowhide), waterproof nylon

The zip-up construction securely wraps around the instep, providing a stable fit that helps prevent heel slippage. For customers with a higher instep, we recommend choosing one size up.