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

    <dimen name="default_margin">16dp</dimen>
    <dimen name="default_padding">16dp</dimen>
    <dimen name="default_padding_half">8dp</dimen>
    <dimen name="default_padding_dialog">24dp</dimen>
    <dimen name="minimum_list_height">72dp</dimen>
    <dimen name="circular_button_size">56dp</dimen>

    <dimen name="btn_dialog_min_width">88dp</dimen>
    <dimen name="btn_dialog_height">36dp</dimen>

</resources>

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

    <dimen name="default_margin">16dp</dimen>
    <dimen name="default_padding">16dp</dimen>
    <dimen name="default_padding_half">8dp</dimen>
    <dimen name="default_padding_dialog">24dp</dimen>
    <dimen name="minimum_list_height">72dp</dimen>
    <!-- circular button backgrounds have a 3.5dp shadow : 56dp (standard FAB size) + 3.5dp -> 59.5dp -->
    <dimen name="circular_button_size">59.5dp</dimen>

    <dimen name="btn_dialog_min_width">88dp</dimen>
    <dimen name="btn_dialog_height">36dp</dimen>

</resources>

Tweak the size of the floating action button
Tweak the size of the floating action button
