The only way to be sure that the information comes across properly is to use HTML in the way approved by the World Wide Web Consortium. There are a number of on-line HTML validators, such as that at WebTechs and A Kinder, Gentler Validator , as well as validators that will run locally. This may look like a meaningless question in the absence of printed pages, but someone on the end of a slow modem in a country with poor telecommunications will have a fairly good idea when a page is too big. For pages whose prupose is to be seen widely, it may be best to keep the amount of text down to less than 10Kb. There are other issues.
People like to see something on the screen whilst the page is being downloaded.
Most browsers will present what they already have. However, they can only do this if what they have can be formatted. Images present another problem. They can also be a hindrance to efficient browsing. There are a number of ways to make images work well.