diff --git a/src/Website/Command/ImportEscapeRoomsFromOsmCommand.php b/src/Website/Command/ImportEscapeRoomsFromOsmCommand.php
index cf92ede..aa3e568 100644
--- a/src/Website/Command/ImportEscapeRoomsFromOsmCommand.php
+++ b/src/Website/Command/ImportEscapeRoomsFromOsmCommand.php
@@ -235,7 +235,7 @@ final class ImportEscapeRoomsFromOsmCommand extends Command
     private function upsert(array $element, bool $dryRun): string
     {
         $tags = $element['tags'] ?? [];
-        $name = trim((string) ($tags['name'] ?? ''));
+        $name = mb_substr(trim((string) ($tags['name'] ?? '')), 0, 255);
         if ($name === '') {
             return 'noname';
         }
@@ -263,16 +263,18 @@ final class ImportEscapeRoomsFromOsmCommand extends Command
                 ->setOsmId($osmId);
         }
 
+        // Clamp each value to its column width - OSM address tags are free text
+        // and occasionally blow past these (e.g. addr:housenumber "12-14, 16, 18").
         $room
             ->setName($name)
-            ->setVenue($this->firstTag($tags, ['brand', 'operator']))
-            ->setStreet($this->firstTag($tags, ['addr:street']))
-            ->setHouseNumber($this->firstTag($tags, ['addr:housenumber']))
-            ->setPostcode($this->firstTag($tags, ['addr:postcode']))
-            ->setCity($this->firstTag($tags, ['addr:city', 'addr:town', 'addr:suburb']))
-            ->setCountry($this->normaliseCountry($this->firstTag($tags, ['addr:country'])))
-            ->setWebsite($this->firstTag($tags, ['website', 'contact:website', 'url']))
-            ->setPhone($this->firstTag($tags, ['phone', 'contact:phone']))
+            ->setVenue($this->firstTag($tags, ['brand', 'operator'], 255))
+            ->setStreet($this->firstTag($tags, ['addr:street'], 255))
+            ->setHouseNumber($this->firstTag($tags, ['addr:housenumber'], 32))
+            ->setPostcode($this->firstTag($tags, ['addr:postcode'], 32))
+            ->setCity($this->firstTag($tags, ['addr:city', 'addr:town', 'addr:suburb'], 128))
+            ->setCountry($this->normaliseCountry($this->firstTag($tags, ['addr:country'], 8)))
+            ->setWebsite($this->firstTag($tags, ['website', 'contact:website', 'url'], 511))
+            ->setPhone($this->firstTag($tags, ['phone', 'contact:phone'], 64))
             ->setLatitude($lat)
             ->setLongitude($lng);
 
@@ -306,15 +308,17 @@ final class ImportEscapeRoomsFromOsmCommand extends Command
     }
 
     /**
+     * First non-empty value among $keys, trimmed and clamped to $maxLen chars.
+     *
      * @param array<string, mixed> $tags
      * @param string[]             $keys
      */
-    private function firstTag(array $tags, array $keys): ?string
+    private function firstTag(array $tags, array $keys, int $maxLen = 255): ?string
     {
         foreach ($keys as $key) {
             $value = trim((string) ($tags[$key] ?? ''));
             if ($value !== '') {
-                return mb_substr($value, 0, 500);
+                return mb_substr($value, 0, $maxLen);
             }
         }