Borders

Top

Right

Bottom

Left

.slds-border_bottom

.slds-border_bottom — Adds a bottom border to an element

.slds-border_left

.slds-border_left — Adds a left border to an element

.slds-border_right

.slds-border_right — Adds a right border to an element

.slds-border_top

.slds-border_top — Adds a top border to an element