boots again..sigh.. lovely (cheapish) boots for work with pencil skirt

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any ideas?
probably black as they will go with them all. preferably to go with knee lenght work style pencil skirt or work dress, and ALSO if possible shorter casual skirts
size 6 - 7 depending on fit, 5 foot 5inch with long body shorter legs, and size 10 if it makes a difference!

tkmaxx

I bought some fabulous navy and grey leather boots for £39.99 there this week (have been after navy boots for yonks)

Some of those Ecco boots look lovely Laska

So flat or heels for a knee length smart skirt? Help !