dimens.xml

<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>

    <!-- http://developer.android.com/design/style/metrics-grids.html -->
    <dimen name="gapSmall">4dp</dimen>
    <dimen name="gapMedium">8dp</dimen>
    <dimen name="gapLarge">16dp</dimen>
    <dimen name="gapXLarge">32dp</dimen>
    <dimen name="gapXXLarge">64dp</dimen>
    <dimen name="gapXXXLarge">128dp</dimen>

    <!-- http://developer.android.com/design/style/typography.html -->
    <dimen name="textSizeMicro">12sp</dimen>
    <dimen name="textSizeSmall">14sp</dimen>
    <dimen name="textSizeMedium">18sp</dimen>
    <dimen name="textSizeLarge">22sp</dimen>
</resources>