docs/user-experience-guidelines/ux-guidelines-payments/payment-button-size.md
Payment buttons must be consistent in visual appearance to other buttons in the shopper experience.
Height for payment buttons ranges from 40px (Small) to 55px (Large). The default button height is 48px. The following presets can be used for button height.
Payment buttons consist of up to three elements: a button component, payment logo, and optional label.
Don't place any text outside the surface area of the button.
The spacing between and around the Label and Payment Logo adapts based on the size of the button.
The height of the button can adapt based on the needs of the theme.
Make payment buttons the same size, no bigger or smaller than other payment buttons, including the CTAs "Add to cart" and "Proceed to checkout".
Use the same width size for all payment buttons. Don't make the width larger or smaller than other payment buttons.
Buttons have a minimum width to ensure readability.
Follow the minimum width of each payment button size. Don't squeeze payment buttons in a single line.
Use the same corner radius for all payment buttons. Don't make the corner radius larger or smaller than other payment buttons.
Provide variant buttons to accommodate merchant needs and payment experiences.
The button label should appear in sentence case, with only the first letter of the first word capitalized.