diff --git a/feature/achievements/src/main/java/io/github/droidkaigi/confsched2023/achievements/component/AchievementImage.kt b/feature/achievements/src/main/java/io/github/droidkaigi/confsched2023/achievements/component/AchievementImage.kt
index 65a83ce88..daf81996c 100644
--- a/feature/achievements/src/main/java/io/github/droidkaigi/confsched2023/achievements/component/AchievementImage.kt
+++ b/feature/achievements/src/main/java/io/github/droidkaigi/confsched2023/achievements/component/AchievementImage.kt
@@ -1,9 +1,10 @@
 package io.github.droidkaigi.confsched2023.achievements.component
 
 import androidx.compose.foundation.Image
-import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
 import io.github.droidkaigi.confsched2023.model.AchievementAnimation
@@ -13,10 +14,12 @@ fun AchievementImage(
     achievementAnimation: AchievementAnimation,
     modifier: Modifier = Modifier,
 ) {
+    val configuration = LocalConfiguration.current
+    val screenWidth = configuration.screenWidthDp.dp
+
     Image(
         painter = painterResource(id = achievementAnimation.getDrawableResId()),
         contentDescription = achievementAnimation.contentDescription,
-        modifier = modifier
-            .padding(horizontal = 21.dp),
+        modifier = modifier.size(screenWidth / 3),
     )
 }