Here's my issue, I have windows and door casing that appears to be 1x6 that was custom routed, my down stairs is almost identical but has a backband. My current baseboard trim I've come to find has
Backband Trim Mouldings One
Colonial Casing Trim Molding 3/4 x 2-3/8 inch Poplar
Interior Trim - Monmouth Millwork - Doors and Windows in New
Beef Up Door and Window Casing with Back Band - Pretty Handy Girl
Trim & Moulding Terminology - Riverside Millwork Group
Kuiken Brothers' Classical Moulding Casing Features Proper Scale
What is this style door casing called? : r/Carpentry
Casing MDF Colonial 2 3/4 x 5/8 x 7' - .64LF - Sold Per Piec
Casing 351 - Next Day Moulding Doors & Stairs
HOUSE OF FARA 8837 5/8 in. x 3-1/4 in. x 96 in. MDF Colonial
Kuiken Brothers' Classical Moulding Casing Features Proper Scale
Door Casing Styles and Which Ones Will Suit Your Home Best - The
Door Casing Styles and Which Ones Will Suit Your Home Best - The
Colonial Backband - Trim Depot