Starting Bag Size
You begin with 30 bag slots (shown in the lower portion of your inventory screen). A separate 20-slot equipment bar along the top holds your tools and weapons and does not count toward bag space. Eight expansions are available, each adding 5 slots, bringing the bag total to 70 slots.
Because your day-to-day tools fill an entire row on their own, upgrading the bag early gives you the breathing room you need for gathering trips, quest items, and gifts.
How to Expand Your Bag
Open your bag (press B on PC).
Below your existing slots there is a box next to the word "Expand". Click it.
A pop-up shows the materials needed for the next expansion.
If you have the required materials, confirm the expansion. If you are missing something, hover over the item icon to see how to obtain it.
You do not need to visit a shop or NPC. The upgrade is built directly into the inventory screen and can be done anywhere, anytime.
Expansion Costs
Each expansion adds 5 slots. Later tiers demand processed goods from multiple professions, farming products, animal drops, and crafting station output.
Expansion | Total Slots | Materials |
|---|---|---|
1 | 35 | 5 Softwood, 5 Stone, 5 Fiber |
2 | 40 | 5 Carbon Line (Spinning Wheel), 5 Stone Brick (Furnace), 5 Softwood Plank (Cutter) |
3 | 45 | 5 Radiant Core (Furnace), 5 Copper Ingot (Furnace), 5 Glass Pane (Cutter) |
4 | 50 | 6 Bronze (Furnace), 16 Flour (Separator), 6 Flannel (Loom), 6 Carbon Line (Spinning Wheel) |
5 | 55 | 7 Hardwood Plank (Cutter), 7 Iron Sheet (Cutter), 10 Vegetable Juice (Separator), 5 Egg, 10 Protein Powder (Separator), 10 Fruit Pulp (Separator) |
6 | 60 | 6 Premium Wood Plank (Cutter), 5 Alloy, 10 Sugar, 3 Sheep Milk, 10 Fish Fillet |
7 | 65 | 3 Meteor Plank, 3 Eternal Alloy, 20 Honey, 20 Rice |
8 | 70 | 4 Meteor Plank, 4 Eternal Alloy, 1 Rainbow Fabric, 5 Stardew Fern, 1 Perpetual Reactor |
Expansions 1 through 3 use basic raw and refined materials that are easy to gather in the first few in-game days. From expansion 4 onward the recipe list grows: you will need eggs from chickens or ducks, flour from wheat, fish fillets, sheep milk, honey, and eventually endgame materials like Meteor Plank, Eternal Alloy, Rainbow Fabric, Stardew Fern, and a Perpetual Reactor. This encourages diversifying across professions rather than specializing in only one.
Storage Boxes
In addition to expanding your bag, you can craft storage boxes to place on your property. Crafting stations automatically pull materials from both your bag and nearby storage boxes, so you do not need to carry everything in your inventory while crafting.
Storage Box | Capacity | Materials | Unlock |
|---|---|---|---|
Storage Box I | 18 slots | 8 Softwood | Complete "Return to the Cabin in the Woods" tutorial quest from Solara |
Storage Box II | 36 slots | 6 Softwood Plank, 3 Copper Sheet | Apprentice Crafter rank; buy blueprint from Zerine's General Store |
Storage Box III | 66 slots | 6 Hardwood Plank, 3 Iron Sheet | Junior Crafter rank; requires Worktable II; buy blueprint from Zerine's General Store |
Flawed Chests
Flawed Chests are scattered around the world and hold 32 slots (equivalent to a Storage Box II). When you open one, you can either collect the chest itself to place as storage at home, or take the contents inside (usually Coins). Keep an eye out for these while exploring, as they are a free storage upgrade early on.
Realm Box
The Realm Box is the endgame shared-inventory chest. Every Realm Box you place shares the same internal inventory, similar to an Ender Chest. Items placed in one Realm Box are accessible from any other, making it invaluable for keeping supplies at your farm, the Moonlit Forest entrance, or any other frequently visited area.
Detail | Info |
|---|---|
Unlock | Intermediate Crafter certification from Zerine |
Blueprint Cost | 7,500 Coins at Zerine's General Store |
Crafting Materials | 5 Alloy, 3 Spirit Cube I, 5 Starflare Core, 6 Hardwood Plank |
Crafted At | Workbench II |
You can also access a Realm Box directly from your inventory if you carry it in your bag, so building more than one and placing them at strategic points around the island is well worth the investment.
Storage Tips
You can turn in materials for Bulletin Board requests and quests directly from your storage chests. You do not need to carry those items around, which saves bag space.
Gifts for NPCs are the exception. You must have those on your person.
Build Storage Box II and III from Zerine's General Store to increase home storage capacity early.
Keep one Storage Box near your crafting stations and another near your farm for convenience.
Position storage boxes near relevant workstations: ores next to smelters, cooking ingredients next to your kitchen, seeds near your crop fields.
Maintain a buffer of 5 to 10 empty bag slots before leaving your base so you have room for unexpected drops while exploring.
The Realm Box eliminates the need to carry materials back and forth between locations. Build one at home and one wherever you spend the most time.