33 blocks in a 7×9×2 space

Flip the lever and the 3×3 doorway opens; flip it back and it closes. It opens in 5 ticks (0.25 s) and closes in 16 ticks (0.8 s).

most compact gravity door (its doorway blocks are sand or gravel)machine hidden from one side when closed

3×3 sand or gravel door: 33 blocks in a 7×9×2 space in the game

7×9×23×3 sand or gravel doorpicture from the real game; the live 3D view replaces it when available

Every record 10

The best door for each thing builders ask for: pick one to see it.

best at	size	speed
Most compact fully seamless door Most compact fully seamless 1-block-thick door with no slime	41 blocks in a 7×8×1 space	opens in 36 ticks (1.8 s), closes in 19 ticks (0.95 s)
Most compact gravity door (its doorway blocks are sand or gravel) (this page)	33 blocks in a 7×9×2 space	opens in 5 ticks (0.25 s), closes in 16 ticks (0.8 s)
Most compact sculk door	37 blocks in a 7×8×1 space	opens in 46 ticks (2.3 s), closes in 14 ticks (0.7 s)
Most compact stone door Most compact door with no slime Most compact 1-block-thick door Most compact door in a 3-thick wall	38 blocks in a 7×8×1 space	opens in 36 ticks (1.8 s), closes in 19 ticks (0.95 s)
Most compact door that uses entities (a minecart or the like) as moving parts	38 blocks in a 7×9×4 space	opens in 36 ticks (1.8 s), closes in 32 ticks (1.6 s)
Fastest door to open and close: a gravity door (sand or gravel door blocks)	48 blocks in a 7×10×4 space	opens in 5 ticks (0.25 s), closes in 11 ticks (0.55 s)
Fastest door to close Fastest stone door to close	90 blocks in a 9×9×5 space	opens in 12 ticks (0.6 s), closes in 7 ticks (0.35 s)
Most compact door that stands on flat ground (no digging below it)	98 blocks in a 9×5×5 space	opens in 54 ticks (2.7 s), closes in 54 ticks (2.7 s)
Fastest stone door to open and close	107 blocks in a 9×10×8 space	opens in 9 ticks (0.45 s), closes in 7 ticks (0.35 s)
Fastest door to open Fastest stone door to open	218 blocks in a 9×11×14 space	opens in 4 ticks (0.2 s), closes in 15 ticks (0.75 s)

Try it

Press play under the view: the door opens, stays open a moment and closes, again and again, like our record video. To take over, tap the lever or the Flip button under the view: once to open the door, again to close it.

Video (real game)

download the video

Build it

Download .litematic Download the design as text

The .litematic opens in Litematica (Minecraft 26.3): every block of the design in one region. Verified in the real game. The text file is the same build written as plain text, block by block.

Blocks used: lever observer obsidian piston redstone block sand slime block smooth stone sticky piston

Details: how it works in depth, our test in the real game, measurements and properties

Properties

Size (community volume)	126b (7x9x2)
Blocks placed	33
Category	gravity
Open / close	5 / 16 gt (0.25 s / 0.8 s), worst of 3 cycles after the lever flip
Rotations	safe
No slime or honey	no
Flat (one block thick)	no
Seamless	machine hidden from one side when closed
Frame when open	7/12
Hallway-compatible	no
Record-eligible (community regulation)	no
Boards	Gravity
Best door for	most compact gravity door (its doorway blocks are sand or gravel)
Found by	agent track gravity-2
Archived	2026-10-18 15:36Z
Video	watch (real game)
Flags	rotation-safe, fits a 3-thick wall, seamless (any tier), the best door for something (the most compact or the fastest of its kind), has a video, size
Design file	`gravity2-g33-33b`

Every check of the community regulation

Nothing left in the doorway	no (not super seamless)
Dents in the wall	dents
Frame blocks in place when open	7 of 12
Lever on its own support block	no
Lever on the wall's surface	yes
Blocks that can be set off by accident	none
Seamless	quart z+ seamless
Seamless even while moving	no

The design file

on GitHub

Design file (46 lines)

# verified WORKS by door leaderboard: 33 blocks, category gravity
# archived 2026-10-18 15:36Z from origin/explore/gravity-2:designs/piston-door-3x3/tracks/gravity-2/BEST.txt (repo at 4835af7)
name: gravity2-g33
port door: 0 0 0
port lever: 1 3 0
origin: -1 0 -1
palette:
  A minecraft:observer[facing=west,powered=false]
  B minecraft:obsidian
  C minecraft:smooth_stone
  D minecraft:sticky_piston[extended=false,facing=down]
  E minecraft:sticky_piston[extended=false,facing=east]
  F minecraft:sticky_piston[extended=false,facing=up]
  G minecraft:sticky_piston[extended=false,facing=west]
  L minecraft:lever[face=wall,facing=east,powered=false]
  O minecraft:observer[facing=east,powered=false]
  P minecraft:piston[extended=true,facing=up]
  R minecraft:redstone_block
  S minecraft:sand
  o minecraft:observer[facing=south,powered=false]
  p minecraft:piston_head[facing=up,short=false,type=normal]
  s minecraft:slime_block
layer -4:
  .
  ..FsO
layer -3:
  .
  ...s
layer -2:
  .
  ..Ps
layer -1:
  .oAC
  sRpDB
layer 0:
  .
  sSSSs
layer 1:
  .
  sSSSs
layer 2:
  .
  sSSSs
layer 3:
  .
  sGLEs