All about interior doors? Types? Sizes?
Solid Wood Flat

The Three Core Builds
Standard interior doors are constructed in three primary ways: solid core molded, hollow core molded, and stile and rail. While these define the durability and feel, each type comes in a variety of styles to fit your home’s specific needs.
Classic Slab & Panel Designs
Panel doors (or slab doors) offer a timeless look with square or oblong patterns. Whether you prefer a simple two-panel layout or a detailed six-panel design with curved tops, these are a versatile choice for any room.
Ready-to-Install Prehung Doors
Skip the hassle with prehung doors. These come already mounted in their own frame with hinges attached, making them ready to fit perfectly into your doorway.
Space-Saving Folding Options
- Accordion Doors: Ideal for tight entryways, these fold in on themselves to stay tucked against the wall.
- Bi-Fold Doors: Perfect for closets and pantries, these can fold to one or both sides to maximize accessibility.
Sliding & Rustic Solutions
- Barn Doors: Hang from a top rail to slide across openings, providing a trendy, rustic aesthetic.
- Sliding Doors: Available in wood or mirrors, these save floor space and can make a room feel significantly larger.
Elegant Glass & Swing Entries
- French Doors: Brighten your home with various glass pane configurations and wood types.
- Cafe & Saloon Doors: These swinging hinged doors allow for easy movement between rooms while maintaining a level of privacy.
Unique & Hidden Transitions
Add a touch of security or whimsy with hidden doors. Often disguised as bookcases, these custom designs can slide or rotate to reveal secret rooms.
Solid 6 Panel
Bi-Fold 

https://www.homedepot.com/c/ab/interior-door-buying-guide/9ba683603be9fa5395fab90ba405845
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