diff --git a/src/main/java/xiamomc/morph/backends/DisguiseWrapper.java b/src/main/java/xiamomc/morph/backends/DisguiseWrapper.java
index 520f2206..95747f51 100644
--- a/src/main/java/xiamomc/morph/backends/DisguiseWrapper.java
+++ b/src/main/java/xiamomc/morph/backends/DisguiseWrapper.java
@@ -114,14 +114,6 @@ public boolean isMobDisguise()
         return getEntityType().isAlive() && getEntityType() != EntityType.PLAYER;
     }
 
-    /**
-     * Gets a {@link BoundingBox} matching the current disguise
-     * @return A {@link BoundingBox} matching the current disguise
-     * @deprecated We use {@link DisguiseWrapper#getDimensions()} or {@link DisguiseWrapper#getBoundingBoxAt(double, double, double)} now
-     */
-    @Deprecated
-    public abstract BoundingBox getBoundingBox();
-
     /**
      * Gets a {@link AABB} matching the current disguise at an exact position
      * @return A {@link AABB} matching the current disguise at the exact position
@@ -154,6 +146,14 @@ public double getExceptingEyeHeight()
 
     private EntityDimensions dimensions;
 
+    /**
+     * 重置此Wrapper已缓存的Dimensions
+     */
+    protected void resetDimensions()
+    {
+        this.dimensions = null;
+    }
+
     private void ensureDimensionPresent()
     {
         if (dimensions != null) return;
@@ -179,7 +179,8 @@ else if (getEntityType() == EntityType.ITEM_DISPLAY)
 
         if (getEntityType() != EntityType.SLIME && getEntityType() != EntityType.MAGMA_CUBE) return;
 
-        this.dimensions = EntityDimensions.fixed(0.51F * getSlimeDimensionScale(), 0.51F * getSlimeDimensionScale());
+        var dimScale = getSlimeDimensionScale();
+        this.dimensions = EntityDimensions.fixed(0.51F * dimScale, 0.51F * dimScale);
     }
 
     /**
@@ -195,11 +196,12 @@ public EntityDimensions getDimensions()
                 : dimensions;
     }
 
-    private Boolean ageable = null;
-
     protected abstract boolean isBaby();
 
-    protected abstract float getSlimeDimensionScale();
+    protected float getSlimeDimensionScale()
+    {
+        return Math.max(1, getCompound().getInt("Size"));
+    }
 
     public abstract void setGlowingColor(ChatColor glowingColor);
 
diff --git a/src/main/java/xiamomc/morph/backends/fallback/NilWrapper.java b/src/main/java/xiamomc/morph/backends/fallback/NilWrapper.java
index ea01dfa3..d0d053c9 100644
--- a/src/main/java/xiamomc/morph/backends/fallback/NilWrapper.java
+++ b/src/main/java/xiamomc/morph/backends/fallback/NilWrapper.java
@@ -35,6 +35,9 @@ public void mergeCompound(CompoundTag compoundTag)
     {
         this.instance.compoundTag.merge(compoundTag);
         this.instance.isBaby = NbtUtils.isBabyForType(getEntityType(), compoundTag);
+
+        if (this.getEntityType() == EntityType.MAGMA_CUBE || this.getEntityType() == EntityType.SLIME)
+            resetDimensions();
     }
 
     @Override
@@ -139,25 +142,12 @@ public void setDisguiseName(String name)
         this.instance.name = name;
     }
 
-    @Deprecated
-    @Override
-    public BoundingBox getBoundingBox()
-    {
-        return new BoundingBox();
-    }
-
     @Override
     protected boolean isBaby()
     {
         return instance.isBaby;
     }
 
-    @Override
-    protected float getSlimeDimensionScale()
-    {
-        return 4;
-    }
-
     @Override
     public void setGlowingColor(ChatColor glowingColor)
     {
diff --git a/src/main/java/xiamomc/morph/backends/libsdisg/LibsDisguiseWrapper.java b/src/main/java/xiamomc/morph/backends/libsdisg/LibsDisguiseWrapper.java
index 0ed0d7ff..9096f78e 100644
--- a/src/main/java/xiamomc/morph/backends/libsdisg/LibsDisguiseWrapper.java
+++ b/src/main/java/xiamomc/morph/backends/libsdisg/LibsDisguiseWrapper.java
@@ -123,22 +123,6 @@ public void setDisguiseName(String name)
         invalidateCompound();
     }
 
-    @Deprecated
-    @Override
-    public BoundingBox getBoundingBox()
-    {
-        FakeBoundingBox box;
-        var mobDisguise = (MobDisguise) instance;
-        var values = DisguiseValues.getDisguiseValues(instance.getType());
-
-        if (!mobDisguise.isAdult() && values.getBabyBox() != null)
-            box = values.getBabyBox();
-        else
-            box = values.getAdultBox();
-
-        return new BoundingBox(0, 0, 0, box.getX(), box.getY(), box.getZ());
-    }
-
     private boolean isBaby;
 
     @Override
@@ -147,13 +131,6 @@ protected boolean isBaby()
         return isBaby;
     }
 
-    @Override
-    protected float getSlimeDimensionScale()
-    {
-        if (!(watcher instanceof SlimeWatcher slimeWatcher)) return 1;
-        return slimeWatcher.getSize();
-    }
-
     @Override
     public void setGlowingColor(ChatColor glowingColor)
     {
@@ -404,6 +381,17 @@ public void mergeCompound(CompoundTag compoundTag)
         this.isBaby = NbtUtils.isBabyForType(getEntityType(), compoundTag);
 
         invalidateCompound();
+
+        var watcher = instance.getWatcher();
+        switch (getEntityType())
+        {
+            case SLIME, MAGMA_CUBE ->
+            {
+                var size = compoundTag.getInt("Size");
+                ((SlimeWatcher)watcher).setSize(size + 1);
+                resetDimensions();
+            }
+        }
     }
 
     @Override
diff --git a/src/main/java/xiamomc/morph/providers/VanillaDisguiseProvider.java b/src/main/java/xiamomc/morph/providers/VanillaDisguiseProvider.java
index 44442274..c94560ac 100644
--- a/src/main/java/xiamomc/morph/providers/VanillaDisguiseProvider.java
+++ b/src/main/java/xiamomc/morph/providers/VanillaDisguiseProvider.java
@@ -35,6 +35,8 @@
 import xiamomc.pluginbase.Bindables.Bindable;
 
 import java.util.List;
+import java.util.Objects;
+import java.util.Random;
 import java.util.stream.Collectors;
 
 public class VanillaDisguiseProvider extends DefaultDisguiseProvider
@@ -121,9 +123,30 @@ public DisguiseResult makeWrapper(Player player, DisguiseMeta disguiseMeta, @Nul
                 ? copyResult.wrapperInstance() //copyResult.success() -> wrapperInstance() != null
                 : backend.createInstance(entityType);
 
+        // Make IDE happy
+        Objects.requireNonNull(constructedDisguise);
+
         // 检查是否有足够的空间
         if (modifyBoundingBoxes.get() && checkSpaceBoundingBox.get())
         {
+            //手动指定史莱姆和岩浆怪的大小
+            if (entityType == EntityType.SLIME || entityType == EntityType.MAGMA_CUBE)
+            {
+                var canCons = canConstruct(disguiseMeta, targetEntity, null);
+
+                if (canCons)
+                {
+                    var size = targetEntity != null
+                                    ? NbtUtils.getRawTagCompound(targetEntity).getInt("Size")
+                                    : new Random().nextInt(1, 4);
+
+                    var initialTag = new CompoundTag();
+
+                    initialTag.putInt("Size", size);
+                    constructedDisguise.mergeCompound(initialTag);
+                }
+            }
+
             var loc = player.getLocation();
             var box = constructedDisguise.getBoundingBoxAt(loc.x(), loc.y(), loc.z());
 
@@ -364,11 +387,11 @@ public boolean validForClient(DisguiseState state)
     }
 
     @Override
-    public boolean canConstruct(DisguiseMeta info, Entity targetEntity, DisguiseState theirState)
+    public boolean canConstruct(DisguiseMeta info, @Nullable Entity targetEntity, DisguiseState theirState)
     {
         return theirState != null
                 ? theirState.getDisguiseWrapper().getEntityType().equals(info.getEntityType())
-                : targetEntity.getType().equals(info.getEntityType());
+                : targetEntity == null || targetEntity.getType().equals(info.getEntityType());
     }
 
     @Override
diff --git a/src/main/java/xiamomc/morph/utilities/NbtUtils.java b/src/main/java/xiamomc/morph/utilities/NbtUtils.java
index 88a198c8..6b892e98 100644
--- a/src/main/java/xiamomc/morph/utilities/NbtUtils.java
+++ b/src/main/java/xiamomc/morph/utilities/NbtUtils.java
@@ -8,6 +8,7 @@
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.EntityType;
 import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
@@ -19,7 +20,7 @@ public class NbtUtils
      * @param entity 目标实体
      * @return 此实体的NBT数据，当实体为null或不为 {@link CraftEntity} 的实例时返回null
      */
-    @Nullable
+    @NotNull
     public static CompoundTag getRawTagCompound(Entity entity)
     {
         if (entity instanceof CraftEntity craftEntity)
@@ -31,7 +32,7 @@ public static CompoundTag getRawTagCompound(Entity entity)
             return entityDataObject.getData();
         }
 
-        return null;
+        return new CompoundTag();
     }
 
     /**