Dh is 47. I do not normally dress him and he is by far the more naturally vain of the two of us. When we met 20 years ago a while back he wore smart jeans and branded tshirts as casual wear. Very clean skate trainers. That sort of thing.
We had too many children in a very short time around a decade ago. During that time we had no money for things we actually like and also didn't leave the house for fun so spent less money on going out clothes.
We have realised that Dh has been wearing the same dissolving clothes for a decade because unlike me he has not changed shape in twenty years.
For a long time, he despaired that elasticated skinny jeans became acceptable for men, even 6 '3 men with bulky thighs like him. So he refused to buy jeans.
He does not know what to wear now, The clothes he enjoyed in the 90s are now finally back but he is sadly, too old to wear them. 
Poor bastard.
He needs casual clothes, and he also could do with some workwear. He works in management in a casual office environment where he has got in the habit of skanky plain tshirts that he wears in a rota of 5 colours. The occasional polo.
I can't help him as I haven't got a fucking clue. I feel bad for him because he always tried to look smart and I feel like his shabbiness is indicative of his feeling a like there isn't any point in trying anymore. 
I was always a lazy shabby fucker and could often be found wearing a work fleece in my downtime
We don't have lots of money but he has had a little pay raise recently and I think we can get him a small wardrobe going that will make him feel good about himself.
He needs shoes and clothes. Casual wear and stuff for work. He is 47, 6 '3 and wears a L/Xl shirt.
Where do your similar menfolk do their shopping?