diff --git a/data/json/items/armor/boots.json b/data/json/items/armor/boots.json
index ea3fb0064f96b..afe0588a83ffc 100644
--- a/data/json/items/armor/boots.json
+++ b/data/json/items/armor/boots.json
@@ -47,6 +47,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL boots", "str_pl": "pairs of XL boots" },
     "copy-from": "boots",
+    "proportional": { "weight": 1.25, "volume": 1.25 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE" ]
   },
   {
@@ -122,6 +123,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL chitinous boots", "str_pl": "pairs of XL chitinous boots" },
     "copy-from": "boots_chitin",
+    "proportional": { "weight": 1.25, "volume": 1.25 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE" ]
   },
   {
@@ -140,6 +142,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL biosilicified chitin boots", "str_pl": "pairs of XL biosilicified chitin boots" },
     "copy-from": "boots_acidchitin",
+    "proportional": { "weight": 1.25, "volume": 1.25 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE" ]
   },
   {
@@ -237,6 +240,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL survivor fireboots", "str_pl": "pairs of XL survivor fireboots" },
     "copy-from": "boots_fsurvivor",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE", "STURDY" ]
   },
   {
@@ -267,6 +271,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL fur boots", "str_pl": "pairs of XL fur boots" },
     "copy-from": "boots_fur",
+    "proportional": { "weight": 1.15, "volume": 1.15 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE" ]
   },
   {
@@ -346,6 +351,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL heavy survivor boots", "str_pl": "pairs of XL heavy survivor boots" },
     "copy-from": "boots_hsurvivor",
+    "proportional": { "weight": 1.2, "volume": 1.2 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE", "STURDY" ]
   },
   {
@@ -377,6 +383,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL leather armor boots", "str_pl": "pairs of XL leather armor boots" },
     "copy-from": "boots_larmor",
+    "proportional": { "weight": 1.3, "volume": 1.3 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE", "STURDY" ]
   },
   {
@@ -408,6 +415,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL light survivor boots", "str_pl": "pairs of XL light survivor boots" },
     "copy-from": "boots_lsurvivor",
+    "proportional": { "weight": 1.4, "volume": 1.4 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE", "STURDY" ]
   },
   {
@@ -439,6 +447,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL armored boots", "str_pl": "pairs of XL armored boots" },
     "copy-from": "boots_plate",
+    "proportional": { "weight": 1.25, "volume": 1.25 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE", "STURDY" ]
   },
   {
@@ -492,6 +501,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL scrap boots", "str_pl": "pairs of XL scrap boots" },
     "copy-from": "boots_scrap",
+    "proportional": { "weight": 1.3, "volume": 1.3 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE" ]
   },
   {
@@ -584,8 +594,9 @@
   {
     "id": "xl_boots_winter",
     "type": "ARMOR",
-    "name": { "str": "pair of oversized winter boots", "str_pl": "pairs of oversized winter boots" },
+    "name": { "str": "pair of XL winter boots", "str_pl": "pairs of XL winter boots" },
     "copy-from": "boots_winter",
+    "proportional": { "weight": 1.3, "volume": 1.3 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE" ]
   },
   {
@@ -617,6 +628,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL winter survivor boots", "str_pl": "pairs of XL winter survivor boots" },
     "copy-from": "boots_larmor",
+    "proportional": { "weight": 1.3, "volume": 1.3 },
     "flags": [ "VARSIZE", "WATERPROOF", "OVERSIZE", "STURDY" ]
   },
   {
@@ -1338,6 +1350,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL chainmail chausses", "str_pl": "pairs of XL chainmail chausses" },
     "copy-from": "chainmail_feet",
+    "proportional": { "weight": 2, "volume": 2 },
     "flags": [ "VARSIZE", "OVERSIZE" ]
   },
   {
diff --git a/data/json/items/armor/gloves.json b/data/json/items/armor/gloves.json
index b2ef72fc4356b..6f5eface84d41 100644
--- a/data/json/items/armor/gloves.json
+++ b/data/json/items/armor/gloves.json
@@ -70,6 +70,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL chainmail gloves", "str_pl": "pairs of XL chainmail gloves" },
     "copy-from": "chainmail_hands",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "STURDY", "OVERSIZE" ]
   },
   {
@@ -125,6 +126,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL chitinous gauntlets", "str_pl": "pairs of XL chitinous gauntlets" },
     "copy-from": "gauntlets_chitin",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "STURDY", "OVERSIZE" ]
   },
   {
@@ -144,6 +146,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL biosilicified chitin gauntlets", "str_pl": "pairs of XL biosilicified chitin gauntlets" },
     "copy-from": "gauntlets_acidchitin",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "STURDY", "OVERSIZE" ]
   },
   {
@@ -219,6 +222,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL leather armor gauntlets", "str_pl": "pairs of XL leather armor gauntlets" },
     "copy-from": "gauntlets_larmor",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "STURDY", "ALLOWS_NATURAL_ATTACKS", "OVERSIZE" ]
   },
   {
@@ -311,6 +315,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL survivor firegloves", "str_pl": "pairs of XL survivor firegloves" },
     "copy-from": "gloves_fsurvivor",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "STURDY", "OVERSIZE", "WATERPROOF" ]
   },
   {
@@ -338,6 +343,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL fur gloves", "str_pl": "pairs of XL fur gloves" },
     "copy-from": "gloves_fur",
+    "proportional": { "weight": 1.6, "volume": 1.6 },
     "flags": [ "WATERPROOF" ]
   },
   {
@@ -368,6 +374,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL heavy survivor gloves", "str_pl": "pairs of XL heavy survivor gloves" },
     "copy-from": "gloves_hsurvivor",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "STURDY", "OVERSIZE", "WATERPROOF" ]
   },
   {
@@ -418,6 +425,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL leather gloves", "str_pl": "pairs of XL leather gloves" },
     "copy-from": "gloves_leather",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "OVERSIZE", "WATERPROOF" ]
   },
   {
@@ -446,6 +454,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL light gloves", "str_pl": "pairs of XL light gloves" },
     "copy-from": "gloves_light",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "OVERSIZE", "WATER_FRIENDLY" ]
   },
   {
@@ -474,6 +483,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL glove liners", "str_pl": "pairs of XL glove liners" },
     "copy-from": "gloves_liner",
+    "proportional": { "weight": 2, "volume": 2 },
     "flags": [ "SKINTIGHT", "OVERSIZE", "WATER_FRIENDLY" ]
   },
   {
@@ -504,6 +514,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL light survivor gloves", "str_pl": "pairs of XL light survivor gloves" },
     "copy-from": "gloves_lsurvivor",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "STURDY", "OVERSIZE", "WATERPROOF" ]
   },
   {
@@ -534,6 +545,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL fingerless survivor gloves", "str_pl": "pairs of XL fingerless survivor gloves" },
     "copy-from": "gloves_survivor_fingerless",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "STURDY", "OVERSIZE", "WATERPROOF", "ALLOWS_NATURAL_ATTACKS" ]
   },
   {
@@ -587,6 +599,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL armored gauntlets", "str_pl": "pairs of XL armored gauntlets" },
     "copy-from": "gloves_plate",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "STURDY", "OVERSIZE" ]
   },
   {
@@ -705,6 +718,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL wool gloves", "str_pl": "pairs of XL wool gloves" },
     "copy-from": "gloves_wool",
+    "proportional": { "weight": 1.4, "volume": 1.4 },
     "flags": [ "OVERSIZE" ]
   },
   {
@@ -863,6 +877,7 @@
     "type": "ARMOR",
     "name": { "str": "pair of XL winter survivor gloves", "str_pl": "pairs of XL winter survivor gloves" },
     "copy-from": "gloves_wsurvivor",
+    "proportional": { "weight": 1.5, "volume": 1.5 },
     "flags": [ "VARSIZE", "WATERPROOF", "STURDY", "OVERSIZE" ]
   },
   {