Proper Cloth is fantastic. From the selection of fabrics, to the default style, to the precise adjustments you can make - it’s the only place i buy shirts. That link will get you $/£20 off - and give me $20 off.
I used to buy from Charles Tyrwhitt since they were the only place that did long enough sleeves but when I discovered Proper Cloth I haven’t looked back.
This is the latest shirt I bought… though I won’t be growing the tache to match!