This is all I buy now. It's thicker. Also has suture string, fishing line and even fire starter inside. If you're making your project for survival purposes, this is the stuff. :
Noble Eagle 25ft 7.5m 550 10-core Paracord 4mm Outdoor Camping Survival Tool Pe Fire Rope Fishing Cotton Line Parachute Hiking - Paracord - AliExpress
550 Paracord with carabiner (100ft) – Brute Magnetics
550 Paracord: The Top Cordage for Survival & Outdoor Adventures
Types of Paracord | TITAN Survival
What's inside a Paracord 550 4mm 7 + 3? - YouTube
Amazon.com : WILDAIR Survival Paracord Parachute Fire Cord Survival Ropes 4-in-1 25Ft 5/32" Diameter U.S. Military Type III with Integrated Fishing Line, Fire-Starter Tinder (Army Green 25FT) : Sports & Outdoors