What is the ideal height of a button in regular desktop applications?

On most GUI creator (I just checked Qt Creator and Flex Builder), it seems the default button height is about 22 pixels. This is what I use for most desktop applications I create except those I make for myself. In this case, I use bigger b…
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Selection of multiple items and then selected one as default

I’m trying to design a web interface in which users pick particular “items” and set one of them as default. The textbox for searching uses autocomplete to find the matching item. I’ve come up with the following design to allow the user to …
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What is the difference between wireframing and prototyping?

What is the difference between wireframing and prototyping?
Am I right to think that prototypes should be interactive and wireframes should be static?
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International Currency Formatting Guidelines — Currency Codes

While developing a web application that presents monetary data for a variety of locales, I am inquiring about the differences of currency formats. In particular, I’d like to know when it is appropriate to use currency codes, either in addi…
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Progressively Filtering Options

I am modelling a selection from a product matrix. The customer envisions this as a series of dropdowns, which progressively filters what is available in a subsequent dropdown.
So for example, the first dropdown could be of "Vehicle Ty…
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Showing how many users voted that a comment was helpful

I’m building a site with items that can be reviewed, and users can vote whether or not reviews are helpful to bubble the best to the top Amazon-style.
Amazon, Yelp, and almost everything else I could find shows the number of people who fou…
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Best UI approach to align the column titles of reports

I would like to know what the best approach is to align header columns according to their data type.
I haven’t found any Human Design Interface articles explaining this.
Should the header column follow the same alignment that its data va…
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Rate vs Like/Dislike

I’m writing a web page that will allow people to rate “objects”. I was thinking of giving users the classical 5 star rating… but then I remembered the like/dislike approach and how YouTube changed from the 5 stars to the like/dislike met…
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Ideal column width for paragraphs online

There is nothing worse than coming across a website with paragraphs that span the width of your screen resolution. They are usually so hard to read, I don’t even bother.
A lot of web designers use generic grid and column systems, but I do…
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Making it clear which items in a long list are selected

I’m trying to design a portion of a web interface that allows users to tag items and view all items with a tag or set of tags on them – think gmail, if gmail allowed you to easily select multiple tags to view all messages with all of those…