No, this won't do! No worries. There is a very quick fix that doesn't involve taking apart waistbands and hems.
1. Put your pants on inside out. Figure out how much extra in the waist and legs you need to take in. PIn the top and carefully step out of the pants.
Notice here I made an original seam then tried the pants on and realized I wanted to take them in 1/4" on each side so I sewed another seam.
Sometimes you will want to take in the inseam as well to get a better fit. Just go for it in the same manor you did the side seams.
Now wear those pants with pride for the next 4 weeks until you go down another size!
Looking for adorable little girl patterns? Have you seen Petite Kids Boutique?