If you have two RecyclerViews, the height is incorrect only on Android 6.0.

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android: orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android: orientation="vertical">

            <android.support.v7.widget.RecyclerView
                android: id="@+id/recyclerView1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:focusable="false"
                app:layoutManager="LinearLayoutManager"
                tools:listitem="@layout/recyclerItem1"/>

            <android.support.v7.widget.RecyclerView
                android: id="@+id/recyclerView2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:focusable="false"
                app:layoutManager="LinearLayoutManager"
                tools:listitem="@layout/recyclerItem2"/>

        </LinearLayout>

        <!--Other Layouts...-->

    </LinearLayout>

</ScrollView>