Tension Change across my first pair of mittens!

Left mitten came out a little bigger since I was probably holding my tiny circular needle too tightly for the right mitten. It is also my first attempt at colorwork) and my third project knitting so it’s neat to see the progress! It’s only a little bigger and still fits so I’ll probably try to block the right one to match the left. Just thought I’d share to see if this is common and if you have any other ideas on how to even them out!

Pattern is Tree of Gondor Mittens by Kulabra Designs (I used the sword variant)