diff --git a/data/json/items/resources/metal.json b/data/json/items/resources/metal.json
index ddbe2401ce50e..6ce22f3d5aae5 100644
--- a/data/json/items/resources/metal.json
+++ b/data/json/items/resources/metal.json
@@ -26,7 +26,7 @@
     "name": { "str": "scrap metal" },
     "description": "A bulky assortment of small bits of scrap steel useful in all kinds of crafting.",
     "weight": "50 g",
-    "volume": "250 ml",
+    "volume": "25 ml",
     "price": 500,
     "price_postapoc": 10,
     "count": 2,
@@ -224,7 +224,8 @@
     "description": "A small sheet of metal.",
     "looks_like": "sheet_metal",
     "weight": "250 g",
-    "volume": "250 ml",
+    "volume": "32 ml",
+    "longest_side": "20 cm",
     "price": 2000,
     "price_postapoc": 10,
     "bashing": 5,
@@ -243,7 +244,7 @@
     "name": { "str": "chunk of steel", "str_pl": "chunks of steel" },
     "description": "A misshapen chunk of steel.  Makes a decent weapon in a pinch, and is also useful for some crafting recipes.",
     "weight": "250 g",
-    "volume": "250 ml",
+    "volume": "63 ml",
     "price": 1000,
     "price_postapoc": 10,
     "bashing": 8,
@@ -263,7 +264,7 @@
     "name": { "str": "lump of steel", "str_pl": "lumps of steel" },
     "description": "A heavy formed piece of steel.  Useful for some crafting recipes.",
     "weight": "1000 g",
-    "volume": "250 ml",
+    "volume": "125 ml",
     "price": 2000,
     "price_postapoc": 50,
     "bashing": 12,
@@ -283,7 +284,7 @@
     "name": { "str": "lump of steel", "str_pl": "lumps of steel" },
     "description": "A heavy formed piece of mild steel.  Useful for some crafting recipes.",
     "weight": "1000 g",
-    "volume": "250 ml",
+    "volume": "125 ml",
     "price": 2000,
     "price_postapoc": 50,
     "bashing": 12,
@@ -303,7 +304,7 @@
     "name": { "str": "lump of steel", "str_pl": "lumps of steel" },
     "description": "A heavy formed piece of medium steel.  Useful for some crafting recipes.",
     "weight": "1000 g",
-    "volume": "250 ml",
+    "volume": "125 ml",
     "price": 2000,
     "price_postapoc": 50,
     "bashing": 12,
@@ -323,7 +324,7 @@
     "name": { "str": "lump of steel", "str_pl": "lumps of steel" },
     "description": "A heavy formed piece of high steel.  Useful for some crafting recipes.",
     "weight": "1000 g",
-    "volume": "250 ml",
+    "volume": "125 ml",
     "price": 2000,
     "price_postapoc": 50,
     "bashing": 12,
@@ -343,7 +344,7 @@
     "name": { "str": "lump of steel", "str_pl": "lumps of steel" },
     "description": "A heavy formed piece of hardened steel.  Useful for some crafting recipes.",
     "weight": "1000 g",
-    "volume": "250 ml",
+    "volume": "125 ml",
     "price": 2000,
     "price_postapoc": 50,
     "bashing": 12,
@@ -363,7 +364,7 @@
     "name": { "str": "lump of steel", "str_pl": "lumps of steel" },
     "description": "A heavy formed piece of tempered steel.  Useful for some crafting recipes.",
     "weight": "1000 g",
-    "volume": "250 ml",
+    "volume": "125 ml",
     "price": 2000,
     "price_postapoc": 50,
     "bashing": 12,
@@ -502,7 +503,7 @@
     "name": { "str": "chunk of low carbon steel", "str_pl": "chunks of low carbon steel" },
     "description": "A misshapen chunk of low carbon steel.  Makes a decent weapon in a pinch, and is also useful for some crafting recipes.",
     "weight": "250 g",
-    "volume": "250 ml",
+    "volume": "63 ml",
     "price": 1000,
     "price_postapoc": 10,
     "bashing": 8,
@@ -521,7 +522,7 @@
     "name": { "str": "chunk of medium carbon steel", "str_pl": "chunks of medium carbon steel" },
     "description": "A misshapen chunk of medium carbon steel.  Makes a decent weapon in a pinch, and is also useful for some crafting recipes.",
     "weight": "250 g",
-    "volume": "250 ml",
+    "volume": "63 ml",
     "price": 1000,
     "price_postapoc": 10,
     "bashing": 8,
@@ -540,7 +541,7 @@
     "name": { "str": "chunk of high carbon steel", "str_pl": "chunks of high carbon steel" },
     "description": "A misshapen chunk of high carbon steel.  Makes a decent weapon in a pinch, and is also useful for some crafting recipes.",
     "weight": "250 g",
-    "volume": "250 ml",
+    "volume": "63 ml",
     "price": 1000,
     "price_postapoc": 10,
     "bashing": 8,
@@ -559,7 +560,7 @@
     "name": { "str": "chunk of high carbon steel", "str_pl": "chunks of high carbon steel" },
     "description": "A misshapen chunk of hardened steel.  Makes a decent weapon in a pinch, and is also useful for some crafting recipes.",
     "weight": "250 g",
-    "volume": "250 ml",
+    "volume": "63 ml",
     "price": 1000,
     "price_postapoc": 10,
     "bashing": 8,
@@ -578,7 +579,7 @@
     "name": { "str": "chunk of high carbon steel", "str_pl": "chunks of high carbon steel" },
     "description": "A misshapen chunk of tempered steel.  Makes a decent weapon in a pinch, and is also useful for some crafting recipes.",
     "weight": "250 g",
-    "volume": "250 ml",
+    "volume": "63 ml",
     "price": 1000,
     "price_postapoc": 10,
     "bashing": 8,
@@ -597,7 +598,7 @@
     "name": { "str": "chunk of budget steel", "str_pl": "chunks of budget steel" },
     "description": "A misshapen chunk of budget steel.  Makes a decent weapon in a pinch, and is also useful for some crafting recipes.",
     "weight": "250 g",
-    "volume": "250 ml",
+    "volume": "63 ml",
     "price": 1000,
     "price_postapoc": 10,
     "bashing": 8,
@@ -616,7 +617,7 @@
     "name": { "str": "lump of budget steel", "str_pl": "lumps of budget steel" },
     "description": "A heavy formed piece of budget steel.  Useful for some crafting recipes.",
     "weight": "1000 g",
-    "volume": "250 ml",
+    "volume": "125 ml",
     "price": 2000,
     "price_postapoc": 50,
     "bashing": 12,
diff --git a/data/json/items/vehicle/plating.json b/data/json/items/vehicle/plating.json
index e213205d86c17..b42a85efc0304 100644
--- a/data/json/items/vehicle/plating.json
+++ b/data/json/items/vehicle/plating.json
@@ -6,6 +6,7 @@
     "description": "A thin sheet of metal.",
     "//": "Roughly in the 70cm×70cm×1.5mm to 1m×1m×0.75mm range. Has to be folded / rolled up when in inventory, so 75% density compared to solid block.",
     "weight": "6000 g",
+    "longest_side": "100 cm",
     "to_hit": -2,
     "color": "light_cyan",
     "symbol": "]",