Clothing for girls

At 9 months I'd choose fabrics that stimulate their senses, so look for colours and patterns, and fabrics that are pleasant to touch.
They also have to be practical; hard wearing, not restrictive, easy to get on and off. And machine washable.

I have two daughters, I tend to dress the smallest in lomg romper suits or leggings-top, so she can move about best. The older is 4 and likes skirts and dresses but still likes to be able to climb and run (which she can do fine). I personally like Lottie and Lysh, Frugi, Boden and Vertbaudet for prints, I am seeing Next online doing better for prints though, I saw a good space top recently. It is definitely easier to get superheroes, dinosaurs, pirates and space on 'girl' clothing. Kite and other Scandi brands are pretty good too.

Isn't gender neutral clothing just dressing more masculine??

No

Anything that doesn't restrict them in any way.

Like PP have said I don't think there is enough recognition of how a lot of young girls' clothing slows them down.

My toddler DD lives in leggings and t shirts and weather appropriate footwear for stamping in puddles/soil.

A relative the same age as DD is always dressed in long flowery dresses, socks with bows on and patent shoes that they constantly trip up over. I always feel really sorry for them when they are trying to join in with rampaging round like DD but can't because of their clothing.

I've been accused of treating DD like a boy but when I query why they think jumping in puddles, digging in soil or trying to get up as much speed as possible on a pink trike are solely activities for boys they can never really answer.

The socialisation of girls to play nicely starts very very young doesn't it sadly.

Clothes and especially footwear that do not hamper them from being active. I'm so fed up of being in a park and seeing small girls in frilly dresses and ballet pumps sitting watching their brothers clamber over the play equipment.
I used to volunteer in my children's school and we had an unexpected visit from a GB athlete (a relative of one of the admin staff) It wasn't a PE day (so none of the children had trainers/ pumps in school) but all the children who had suitable footwear on were allowed out onto the field to do some athletics with the visitor. The teacher let all the boys take part but about half the girls were made to just watch because the teacher was worried they'd fall and hurt themselves. The children were in Year 1.

Firstly anything she can run, jump, play in is a must. I buy lots of things from charity shops, from both the girls and boys bits.
I love little green radicals, frugi- but mostly their boys stuff.
I like h&m for stripes and colourful clothing, I don't usually buy anything with writing on, but did have a babygrow with 'feminist on, that was printed for her.
Love a dinosaur / space print dress if we are going down the dress route. Can get these from etsy.

Isn't gender neutral clothing just dressing more masculine??

I find it best to think of clothing as functional. I focus on the weather when helping my dds pick out clothing.