diff --git a/data/main_fields.yaml b/data/main_fields.yaml
index 00b535e..e8ca9ed 100644
--- a/data/main_fields.yaml
+++ b/data/main_fields.yaml
@@ -85,7 +85,7 @@
 - key: 10
   name: material_name
   type: string
-  max_length: 31
+  max_length: 63
   example: PC Blend Carbon Fiber Black
   required: recommended
   description: