List of standard lengths for database fields

Question

I\'m designing a database table and once again asking myself the same stupid question: How long should the firstname field be?

Does anyone have a li

Answer 1

I usually go with:

Firstname: 30 chars
Lastname: 30 chars
Email: 50 chars
Address: 200 chars

If I am concerned about long fields for the names, I might sometimes go with 50 for the name fields too, since storage space is rarely an issue these days.