diff --git a/packages/avatar/components/Avatar.tsx b/packages/avatar/components/Avatar.tsx
index 8b4eef907..52b662d60 100644
--- a/packages/avatar/components/Avatar.tsx
+++ b/packages/avatar/components/Avatar.tsx
@@ -19,11 +19,20 @@ export interface AvatarProps {
    * Which icon size to use for the width and height
    */
   size?: IconSize;
+  /**
+   * Allows custom styling
+   */
+  className?: string;
 }
 
-const Avatar = ({ label, src, size = DEFAULT_AVATAR_SIZE }: AvatarProps) => (
+const Avatar = ({
+  label,
+  src,
+  className,
+  size = DEFAULT_AVATAR_SIZE
+}: AvatarProps) => (
   <div
-    className={cx(avatarContainer, avatarSize(iconSizes[size]))}
+    className={cx(avatarContainer, avatarSize(iconSizes[size]), className)}
     role="img"
     aria-label={label}
     data-cy="avatar"
diff --git a/packages/badge/components/ColorCodedBadge.tsx b/packages/badge/components/ColorCodedBadge.tsx
index e95ba8498..1472c7cdc 100644
--- a/packages/badge/components/ColorCodedBadge.tsx
+++ b/packages/badge/components/ColorCodedBadge.tsx
@@ -10,6 +10,10 @@ export interface ColorCodedBadgeProps {
   color?: React.CSSProperties["color"];
   iconShape?: SystemIcons;
   children?: JSX.Element | string;
+  /**
+   * Allows custom styling
+   */
+  className?: string;
 }
 
 const ICON_SIZE = "xxs";
@@ -17,12 +21,13 @@ const ICON_SIZE = "xxs";
 const ColorCodedBadge = ({
   children,
   color,
+  className,
   iconShape
 }: ColorCodedBadgeProps) => {
   const iconSize = parseInt(iconSizes[ICON_SIZE], 10);
 
   return (
-    <Badge appearance="outline">
+    <Badge appearance="outline" className={className}>
       {iconShape ? (
         <Icon shape={iconShape} size={ICON_SIZE} color={color} />
       ) : (
diff --git a/packages/badge/components/badge.tsx b/packages/badge/components/badge.tsx
index f5cc13ab0..23575cf4f 100644
--- a/packages/badge/components/badge.tsx
+++ b/packages/badge/components/badge.tsx
@@ -1,4 +1,5 @@
 import * as React from "react";
+import { cx } from "@emotion/css";
 import { badge } from "../style";
 
 export type BadgeAppearance =
@@ -12,11 +13,19 @@ export type BadgeAppearance =
 export interface BadgeProps {
   appearance?: BadgeAppearance;
   children: React.ReactNode | string;
+  /**
+   * Allows custom styling
+   */
+  className?: string;
 }
 
-export const Badge = ({ appearance = "default", children }: BadgeProps) => {
+export const Badge = ({
+  appearance = "default",
+  children,
+  className
+}: BadgeProps) => {
   return (
-    <span className={badge(appearance)} data-cy="badge">
+    <span className={cx(badge(appearance), className)} data-cy="badge">
       {children}
     </span>
   );
diff --git a/packages/badge/components/badgeButton.tsx b/packages/badge/components/badgeButton.tsx
index b578f4b4e..b61996f32 100644
--- a/packages/badge/components/badgeButton.tsx
+++ b/packages/badge/components/badgeButton.tsx
@@ -1,4 +1,4 @@
-import { css } from "@emotion/css";
+import { css, cx } from "@emotion/css";
 import * as React from "react";
 import Clickable from "../../clickable/components/clickable";
 import { badge as badgeButton } from "../style";
@@ -11,6 +11,10 @@ export interface BadgeButtonProps {
     | "warning"
     | "danger"
     | "outline";
+  /**
+   * Allows custom styling
+   */
+  className?: string;
   onClick: (event?: React.SyntheticEvent<HTMLElement>) => void;
   /**
    * Tab index indicates if an element can be focused for more information see
@@ -25,11 +29,12 @@ export interface BadgeButtonProps {
 const BadgeButton = ({
   appearance = "default",
   children,
+  className,
   onClick,
   tabIndex = -1,
   "data-cy": dataCy = "badgeButton"
 }: BadgeButtonProps) => {
-  const className = css`
+  const defaultClassName = css`
     outline: none;
     cursor: pointer;
     ${badgeButton(appearance)};
@@ -37,7 +42,7 @@ const BadgeButton = ({
 
   return (
     <Clickable action={onClick} tabIndex={tabIndex} data-cy={dataCy}>
-      <span className={className}>{children}</span>
+      <span className={cx(defaultClassName, className)}>{children}</span>
     </Clickable>
   );
 };
diff --git a/packages/button/components/ButtonBase.tsx b/packages/button/components/ButtonBase.tsx
index 084103023..61a7d572e 100644
--- a/packages/button/components/ButtonBase.tsx
+++ b/packages/button/components/ButtonBase.tsx
@@ -42,6 +42,10 @@ export interface ButtonProps extends LinkProps {
    */
   ariaLabel?: string;
   children?: React.ReactNode | string;
+  /**
+   * Allows custom styling
+   */
+  className?: string;
   /**
    * whether or not the button is enabled
    */
@@ -88,7 +92,6 @@ export interface ButtonProps extends LinkProps {
 
 export interface ButtonBaseProps extends ButtonProps {
   appearance: ButtonAppearances;
-  className?: string;
 }
 
 const ButtonContent = ({ iconStart, iconEnd, isProcessing, children }) => {
diff --git a/packages/card/components/ButtonCard.tsx b/packages/card/components/ButtonCard.tsx
index 776dc9a21..2a3b664ee 100644
--- a/packages/card/components/ButtonCard.tsx
+++ b/packages/card/components/ButtonCard.tsx
@@ -27,6 +27,10 @@ export interface ButtonCardProps extends CardProps {
    * Whether the component's child input has focus
    */
   hasFocus?: boolean;
+  /**
+   * Allows custom styling
+   */
+  className?: string;
 }
 
 const ButtonCard = ({
@@ -35,6 +39,7 @@ const ButtonCard = ({
   disabled,
   hasFocus,
   onClick,
+  className,
   onKeyPress,
   ...other
 }: ButtonCardProps) => {
@@ -64,13 +69,17 @@ const ButtonCard = ({
 
   return (
     <Card
-      className={cx(buttonCard, {
-        [buttonCardActive]: isActive,
-        [buttonCardDisabled]: disabled,
-        [buttonCardDisabledActive]: disabled && isActive,
-        [buttonCardFocused]: hasFocus,
-        [buttonCardFocusedActive]: hasFocus && isActive
-      })}
+      className={cx(
+        buttonCard,
+        {
+          [buttonCardActive]: isActive,
+          [buttonCardDisabled]: disabled,
+          [buttonCardDisabledActive]: disabled && isActive,
+          [buttonCardFocused]: hasFocus,
+          [buttonCardFocusedActive]: hasFocus && isActive
+        },
+        className
+      )}
       {...buttonProps}
       data-cy="buttonCard"
       {...other}
diff --git a/packages/card/components/Card.tsx b/packages/card/components/Card.tsx
index b017aad31..bc3dc9e76 100644
--- a/packages/card/components/Card.tsx
+++ b/packages/card/components/Card.tsx
@@ -36,8 +36,14 @@ export interface CardProps extends React.HTMLProps<HTMLDivElement> {
      * Size can be set to "s", "m", or "l" to increase the header height. If not specified, size will default to medium.
      */
     size?: HeaderSizes;
+    /**
+     * Allows custom header styling
+     */
+    className?: string;
   };
-
+  /**
+   * Allows custom styling
+   */
   className?: string;
 }
 
@@ -62,7 +68,13 @@ const Card = ({
       {...other}
     >
       {header?.headerImg && (
-        <div className={cx(cardHeaderImage, headerHeight[headerSize])}>
+        <div
+          className={cx(
+            cardHeaderImage,
+            headerHeight[headerSize],
+            header.className
+          )}
+        >
           <img src={header.headerImg} alt={header.headerImgAltText ?? ""} />
         </div>
       )}
diff --git a/packages/icon/components/Icon.tsx b/packages/icon/components/Icon.tsx
index 869cde2e3..af409258d 100644
--- a/packages/icon/components/Icon.tsx
+++ b/packages/icon/components/Icon.tsx
@@ -11,17 +11,33 @@ const DEFAULT_ICON_SIZE: IconSize = "s";
 
 export type IconShapes = SystemIcons | ProductIcons;
 export interface IconProps {
-  /** If an icon is more than decorative and requires further context include a description for screen readers */
+  /**
+   * If an icon is more than decorative and requires further context include a description for screen readers
+   */
   ariaLabel?: string;
-  /** The fill color of the icon */
+  /**
+   * Allows custom styling
+   */
+  className?: string;
+  /**
+   * The fill color of the icon
+   */
   color?: string;
-  /** The id of the SVG symbol we're rendering from a generated sprite */
+  /**
+   * The id of the SVG symbol we're rendering from a generated sprite
+   */
   shape: SystemIcons | ProductIcons;
-  /** Which icon size to use for the width and height of the icon */
+  /**
+   * Which icon size to use for the width and height of the icon
+   */
   size?: IconSize;
-  /** human-readable selector used for writing tests */
+  /**
+   * human-readable selector used for writing tests
+   */
   ["data-cy"]?: string;
-  /** Sets display to block if true */
+  /**
+   * Sets display to block if true
+   */
   block?: boolean;
 }
 
@@ -31,7 +47,8 @@ const Icon = ({
   shape,
   ariaLabel,
   "data-cy": dataCy,
-  block
+  block,
+  className
 }: IconProps) => {
   const svgColor = color || "currentColor";
   const iconSize = iconSizes[size];
@@ -44,7 +61,7 @@ const Icon = ({
       viewBox={`0 0 ${parseInt(iconSize, 10)} ${parseInt(iconSize, 10)}`}
       role="img"
       aria-label={ariaLabel || `${shape} icon`}
-      className={cx(icon, tintSVG(svgColor), block ? blockIcon : "")}
+      className={cx(icon, tintSVG(svgColor), block ? blockIcon : "", className)}
       data-cy={["icon", dataCy].filter(Boolean).join(" ")}
     >
       <use xlinkHref={`#${shape}`} />
diff --git a/packages/inlineBorderedItems/components/InlineBorderedItems.tsx b/packages/inlineBorderedItems/components/InlineBorderedItems.tsx
index 56bb30a90..ad156ffe0 100644
--- a/packages/inlineBorderedItems/components/InlineBorderedItems.tsx
+++ b/packages/inlineBorderedItems/components/InlineBorderedItems.tsx
@@ -1,4 +1,5 @@
 import * as React from "react";
+import { cx } from "@emotion/css";
 import { SpaceSize } from "../../shared/styles/styleUtils/modifiers/modifierUtils";
 import { inlineBorderedItems } from "../style";
 
@@ -6,14 +7,21 @@ export interface InlineBorderedItemsProps {
   children:
     | Array<React.ReactElement<HTMLElement>>
     | React.ReactElement<HTMLElement>;
+  /**
+   * Allows custom styling
+   */
+  className?: string;
   gutterSize?: SpaceSize;
 }
 
 const InlineBorderedItems = ({
   children,
+  className,
   gutterSize = "s"
 }: InlineBorderedItemsProps) => (
-  <div className={inlineBorderedItems(gutterSize!)}>{children}</div>
+  <div className={cx(inlineBorderedItems(gutterSize!), className)}>
+    {children}
+  </div>
 );
 
 export default InlineBorderedItems;