Standard dimensions for Android

dimens.xml

<resources>
    <dimen name="spacing_xxs">2dp</dimen>
    <dimen name="spacing_xs">4dp</dimen>
    <dimen name="spacing_small">8dp</dimen>
    <dimen name="spacing_medium">16dp</dimen>
    <dimen name="spacing_large">24dp</dimen>
    <dimen name="spacing_xl">32dp</dimen>
    <dimen name="spacing_xxl">48dp</dimen>
    <dimen name="spacing_xxxl">72dp</dimen>

    <dimen name="height_small">48dp</dimen>
    <dimen name="height_medium">56dp</dimen>
    <dimen name="height_large">72dp</dimen>
    <dimen name="height_xl">120dp</dimen>

    <dimen name="font_xs">12sp</dimen>
    <dimen name="font_small">14sp</dimen>
    <dimen name="font_medium">16sp</dimen>
    <dimen name="font_large">18sp</dimen>
    <dimen name="font_xl">22sp</dimen>

    <dimen name="icon_small">18dp</dimen>
    <dimen name="icon_medium">24dp</dimen>
    <dimen name="icon_large">32dp</dimen>
    <dimen name="icon_xl">48dp</dimen>
    <dimen name="icon_xxl">64dp</dimen>

    <dimen name="button_size">@dimen/height_small</dimen>

</resources>