The tough part would be doing it without coming across as the "enforcer." If your hubby feels like he must account to you for every pence, then you can bet resentment will build up quickly and you'll have gone from a spending problem to deeper marital woes.
So, in my opinion your goal (long term and short term) isn't to get your husband to spend less. It's to get him to move closer to your values concerning money, the freedom that comes from responsible saving and spending, and your priorities about which things are worth buying.
Maybe a sit down with some numbers crunched on where you want to go and how to get there? Or meet with some third party who can help you address these issues?
In the big scheme of things the examples you cite aren't huge ones. DO you consult him before you buy clothing?
When my wife and I first started saving we set a budget for ourselves with all the usual categories (including retirement savings, which went directly from my paycheck to the bank). We consulted each other, when feasible, on expenditures in these categories (New doorknobs would have gone under "home improvements" and we would have talked about whether there was enough money in that envelope and whether that was the best use of that money). We also had a comfortable "allowance" for each of us to be spent on whatever we want every month--magazine subscriptions, impulse purchases, etc. I saved up and bought some nice woodworking equipment after many months. It worked well for us, and after our earnings increased a bit and we got into healthy spending habits we stopped doing things this way. But in my opinion it's important for each partner to have money that is truly theirs to spend as they choose.
Remember that there are lots of messages in society telling people to spend, spend, spend. If your husband is like most people, he's listening. You may be seen as the aberrant one. Also, trying to change a person's outlook on these things can be extremely difficult (would you be likely to change your views if he tried to convince you to put less in savings?). In my experience, the person usually has to come to the decision themselves, and this usually follows a crisis of some sort.
Best of luck to you both.