Blocks

A Block is a basic unit of structure occupying space in the world.

A Collision Box is a solid volume of space that the player is not meant to pass through, which consists of one or multiple Bounding Boxes, which are axis-aligned cuboids. Entities have their own bounding box, but are not treated as solid space (except for boats).

• Not to confuse with a Hitbox, which is a volume of space that a player can interact with (attack, mine, right-click...).

• Also not to confuse with a Model, which is simply the graphical representation of a block / entity on screen.
• Finally, some blocks have their own "effect box", such as fluids, ladders, cacti, pressure plates... All of which are coded and applied differently.

For example: a button has no collision box, as the player can walk through one, but has a hitbox which the player can click on.

Another example: a barrier block has overlapping bounding box and hitbox, but is hard-coded to have no model.

This article lists the collision boxes and properties of all blocks in 1.8.

Blocks with particular properties and/or no collision boxes are presented on their own articles.

Images were taken with Blockbench, or from the Minecraft wiki.

Resources:

• BetterParkourModels, a resource pack that modifies models to be slightly more accurate.
• BetterParkourModels+, an faithful update to BPM that corrects and adds some models (made by Fuzzbearplush).
• TrueModels, an alternative resource pack that reworks models to look accurate and natural.

Simple Collision Boxes

Collision boxes that consist of a single bounding box. Blocks are ordered by length, then width, then height.

Block	Widths (b)	Height (b)	Comments	Model
Wall (4-sided)	1 × 1	1.5	Adjacent blocks must be solid, walls, or fencegates.
Default	1 × 1	1
Soulsand	1 × 1	0.875	Looks like a full block, but is actually 2 px lower. Slows down entities walking on top of it.
End Portal Frame	1 × 1	0.8125
Enchantment Table	1 × 1	0.75
Bed block	1 × 1	0.5625	The bottom doesn't look tangible, but it actually is.
Slab	1 × 1	0.5	Inversible.
Daylight Sensor	1 × 1	0.375
Trapdoor (horizontal)	1 × 1	0.1875	Inversible. Can be flipped to its vertical variant.
Repeater	1 × 1	0.125
Carpet	1 × 1	0.0625
Lily Pad	1 × 1	0.015625	Is ¼ of a pixel in height.
Snow Layer	1 × 1	0 0.125 0.25 0.375 0.5 0.625 0.75 0.875	Snow layers look 2 pixels higher than their real height. Despite having no height, a single layer of snow is tangible.
Wall (3-sided)	1 × 0.75	1.5	Orientable (4 variants). Adjacent blocks must be solid, walls, or fencegates.
Anvil	1 × 0.75	1	Centered. Orientable (2 variants). Looks thinner than it actually is.
Piston Base (Powered)	1 × 0.75	1	Orientable (4 variants).
Wall (2-opposite)	1 × 0.375	1.5	Centered. Orientable (2 variants). Adjacent blocks must be solid, walls, or fencegates. Placing a block on top of it doesn't change its collision box, despite its appearance being different.
Fence (2-opposite)	1 × 0.25	1.5	Centered. Orientable (2 variants). Adjacent blocks must be solid, fences, or fencegates.
Fencegate	1 × 0.25	1.5	Centered. Orientable (2 variants). Can be flipped to a variant with no collision box.
Trapdoor (vertical)	1 × 0.1875	1	Orientable, Inversible (8 variants). Can be flipped to its horizontal variant.
Door	1 × 0.1875	1	Orientable (4 variants). Can be flipped to another variant.
Ladder	1 × 0.125	1	Orientable (4 variants). Can be climbed by entities.
Pane (2-opposite)	1 × 0.125	1	Centered. Orientable (2 variants). Adjacent blocks must be solid, or panes/bars.
Chest (long)	0.9375 × 0.875	0.875	Must be next to another chest.
Dragon Egg	0.875 × 0.875	1	Centered. Looks drastically different from its collision box.
Cactus	0.875 × 0.875	0.9375	Centered. Hurts entities close to it.
Chest	0.875 × 0.875	0.875	Centered.
Cake	0.875 × 0.875 0.875 × 0.75 0.875 × 0.625 0.875 × 0.5 0.875 × 0.375 0.875 × 0.25 0.875 × 0.125	0.5	The full cake is centered. Each bite takes away 0.125b from the West (-X)
Wall (2-adjacent)	0.75 × 0.75	1.5	Orientable (4 variants). Adjacent blocks must be solid, walls, or fencegates.
Wall (1-sided)	0.75 × 0.5	1.5	Orientable (4 variants). Adjacent block must be solid, a wall, or a fencegate.
Fence (1-sided)	0.625 × 0.25	1.5	Orientable (4 variants). Adjacent block must be solid, a fences, or a fencegate.
Wall (default)	0.5 × 0.5	1.5	Centered.
Cocoa (big)	0.5 × 0.5	Low: 0.1875 Top: 0.75	Orientable (4 variants). 1 pixel away from the wall it's attached to. Trivia: the top texture is only 7 pixels wide.
Head (walled)	0.5 × 0.5	Low: 0.25 Top: 0.75	Orientable (4 variants).
Head (default)	0.5 × 0.5	0.5	Centered. A head can be placed diagonally (16 variants total), but the collision box doesn't change.
Pane (1-sided)	0.5 × 0.125	1	Orientable (4 variants). Appears 1 pixel longer than it really is. Adjacent block must be solid, or a pane/bar.
Cocoa (medium)	0.375 × 0.375	Low: 0.3125 Top: 0.75	Orientable (4 variants). 1 pixel away from the wall it's attached to.
Flowerpot	0.375 × 0.375	0.375	Centered.
Fence (default)	0.25 × 0.25	1.5	Centered.
Cocoa (small)	0.25 × 0.25	Low: 0.4375 Top: 0.75	Orientable (4 variants). 1 pixel away from the wall it's attached to.

Composite Collision Boxes

Collision boxes that consist of two or more bounding boxes.

"Except" represents an intangible zone rather than a tangible one (simpler to describe that listing all bounding boxes)

Block	Widths (b)	Height (b)	Comments	Model
Stair (normal)	Base: 1 × 1 Top: 1 × 0.5	Base: 0.5 Top: 1	Orientable, Inversible (8 variants).
Stair (outer)	Base: 1 × 1 Top: 0.5 × 0.5	Base: 0.5 Top: 1	Orientable, Inversible (8 variants). Depends on adjacent stair blocks.
Stair (inner)	Base: 1 × 1 Except: -0.5 × -0.5	Base: 1 Except: -0.5	Orientable, Inversible (8 variants). Depends on adjacent stair blocks.
End Portal Frame (eye)	Base: 1 × 1 Eye: 0.375 × 0.375	Base: 0.8125 Eye: 1	The eye looks bigger than it is. (Appears 8 px in width, but is actually 6 px wide)
Hopper	Base: 1 × 1 Except: -0.75 × -0.75	Base: 1 Except: -0.375	The bottom doesn't look tangible, but it actually is. The interior floor is 1 pixel lower than it looks.
Cauldron	Base: 1 × 1 Except: -0.75 × -0.75	Base: 1 Except: -0.6875	The bottom doesn't look tangible, but it actually is. The interior floor is 1 pixel higher than it looks
Brewing Stand	Base: 1 × 1 Rod: 0.125 × 0.125	Base: 0.125 Rod: 0.875	The base looks very different from its bounding box.
Piston Head (Vertical)	Head: 1 × 1 Arm: 0.25 × 0.25	Head: 0.25 Top: 1	Centered. Inversible. The arm is shorter than it looks (model extended by 4px).
Piston Head (N/S/E)	Head: 1 × 0.25 Arm: 0.75 × 0.5	Head: 1 Arm-Low: 0.375 Arm-Top: 0.625	Orientable (3 variants). Accurate model. The arm is wider than it looks (0.5m width). The arm is shorter than it looks (model extended by 4px).
Piston Head (West)	Head: 1 × 0.25 Arm: 0.75 × 0.25	Head: 1 Arm-Low: 0.25 Arm-Top: 0.75	Bugged (fixed in 1.9). Accurate model. The player can walk through a west extended piston. In 1.9, piston heads were changed to match their model.
Fence (4-sided)	Post: 0.25 × 0.25 Sides: 0.375 × 0.25	1.5	Adjacent blocks must be solid, fences, or fencegates.
Fence (3-sided)	Post: 0.25 × 0.25 Sides: 0.375 × 0.25	1.5	Orientable (4 variants). Adjacent blocks must be solid, fences, or fencegates.
Fence (2-adjacent)	Post: 0.25 × 0.25 Sides: 0.375 × 0.25	1.5	Orientable (4 variants). Adjacent blocks must be solid, fences, or fencegates.
Pane (Default / 4-sided)	Sides: 0.5 × 0.125	1	Adjacent blocks must be solid, or panes/bars.
Pane (3-sided)	Sides: 0.5 × 0.125	1	Orientable (4 variants). Adjacent blocks must be solid, or panes/bars.
Pane (2-adjacent)	Sides: 0.5 × 0.125	1	Orientable (4 variants). Adjacent blocks must be solid, or panes/bars. The exterior corner has a 1px wide opening (despite the model showing a clean 90° corner).

Other

Block	Widths (b)	Height (b)	Comments	Model
Boat	1.5 x 1.5	0.6	Entity.