Pull-on work boots don't have laces to secure your foot so it's important that they fit correctly. Boots in general tend to run a bit larger with many needing to size down a half or whole size.

The best work boot overall is Thorogood’s American Heritage Moc Toe. With a reinforced steel toe, waterproof ... Boots For Men: Duradero Buckhannon Steel-Toed Work Boot Best Slip-On Work Boots ...