Final Size = 57 L x 11 W x 22 H

Spruce Planks 736

Light Gray Wool 474

White Wool 333

Spruce Slabs 326

Smooth Quartz Slab 298

Light Gray Concrete 209

Smooth Quartz Block 170

Black Glass 122

Black Glass Pane 72

Smooth Quartz Stairs 55

Andesite Wall 24

Block of Iron 23

Smooth Stone Slab 17

Polished Blackstone Stairs 16

White Concrete 15

Nether Brick Fence 13

Smooth Stone 11

Stone Button 8

Andesite Stairs 8

Oak Stairs 8

Polished Andesite Stairs 6

Oak Planks 6

Iron Bars 6

Daylght Detector 5

Cauldron 4

Polished Blackstone Slabs 4

Item Frames 4

Dark Oak Trapdoor 4

Leaves 3

Flower Pots 3

Red Wool 3

Birch Stairs 3

Birch Slabs 3

Iron Trapdoor 2

Polished Diorite Slab 2

Spawner 2

Lectern 2

Light Gray Carpet 2

Blast Furnace 2

Comparators 2

Dark Oak Sign 1

Lever 1

Brewing Stand 1

Blue Wool 1

Polished Blackstone Button 1

Dark Oak Fence Gate 1

This is not 100% accurate, but it's pretty dang close.