Include small.

bikeshop_project/bike/migrations/0004_auto_20170129_2220.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.4 on 2017-01-29 22:20
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bike', '0003_auto_20170105_1405'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bike',
+            name='size',
+            field=models.TextField(blank=True, choices=[('C', 'child'), ('S', 'small'), ('M', 'medium'), ('L', 'large'), ('XL', 'extra large')], max_length=2, null=True),
+        ),
+    ]

bikeshop_project/bike/models.py

@@ -35,6 +35,7 @@ class Bike(models.Model):
 
     size_choices = (
         (CHILD, 'child'),
+        (SMALL, 'small'),
         (MEDIUM, 'medium'),
         (LARGE, 'large'),
         (EXTRA_LARGE, 'extra large'),