diff --git a/figures/parameter_size_overview.png b/figures/parameter_size_overview.png
index bf01dfc..19c07f0 100644
Binary files a/figures/parameter_size_overview.png and b/figures/parameter_size_overview.png differ
diff --git a/figures/scripts/parameter_size_overview_generate.py b/figures/scripts/parameter_size_overview_generate.py
index 8196fd2..991b1f1 100644
--- a/figures/scripts/parameter_size_overview_generate.py
+++ b/figures/scripts/parameter_size_overview_generate.py
@@ -47,11 +47,48 @@
     "EN-unavailable": "#B8CDF7",
 }
 
+labels = {
+    "JP-available": "Japanese (public)",
+    "JP-unavailable": "Japanese (private)",
+    "EN-available": "English (public)",
+    "EN-unavailable": "English (private)",
+}
+
 fig, ax = plt.subplots(figsize=(10, 8))
 
-for i in reversed(range(len(df))):
-    ax.scatter(df["Announced"][i], df["Parameters(B)"][i], color=colors[df["Type"][i]], s=100 if df["Type"][i].startswith("JP") else 30)
+ax.scatter(
+    df[df["Type"] == "EN-unavailable"]["Announced"],
+    df[df["Type"] == "EN-unavailable"]["Parameters(B)"],
+    color=colors["EN-unavailable"],
+    label=labels["EN-unavailable"],
+    s=30
+)
+
+ax.scatter(
+    df[df["Type"] == "EN-available"]["Announced"],
+    df[df["Type"] == "EN-available"]["Parameters(B)"],
+    color=colors["EN-available"],
+    label=labels["EN-available"],
+    s=30
+)
+
+ax.scatter(
+    df[df["Type"] == "JP-unavailable"]["Announced"],
+    df[df["Type"] == "JP-unavailable"]["Parameters(B)"],
+    color=colors["JP-unavailable"],
+    label=labels["JP-unavailable"],
+    s=100
+)
+
+ax.scatter(
+    df[df["Type"] == "JP-available"]["Announced"],
+    df[df["Type"] == "JP-available"]["Parameters(B)"],
+    color=colors["JP-available"],
+    label=labels["JP-available"],
+    s=100
+)
 
+for i in reversed(range(len(df))):
     if df["Type"][i].startswith("JP"):
         ax.text(
             df["Announced"][i],
@@ -61,7 +98,6 @@
             verticalalignment='bottom',
             horizontalalignment='center'
         )
-
     if df["Type"][i].startswith("EN") and df["Lab"][i] in BIGTECH_LIST and df["Parameters(B)"][i] > 100:
         ax.text(
             df["Announced"][i],
@@ -87,4 +123,5 @@
 
 plt.xticks(rotation=45)
 plt.subplots_adjust(left=0.075, right=0.975, bottom=0.1, top=0.975)
+plt.legend()
 plt.savefig("../parameter_size_overview.png", dpi=144)
\ No newline at end of file