Space sizing is where most Contentful negotiations go wrong, costing companies thousands in unnecessary overages or upgrade fees. Vendr's data shows that 67% of companies initially under-size their spaces, leading to expensive mid-contract upgrades. Here's the pricing reality: Medium Space add-ons start around $8,000, Large Spaces at $19,000, Extra Large at $35,000, and 2XL/3XL spaces can reach $75,000+ each. But the negotiated rates vary dramatically—Large Spaces negotiate down to $11,400-$15,200 (40-45% discounts), while smaller spaces typically see only 25-30% discounts.