How big should it be? You will see a range in size from seven inches to over ten inches. The size should be determined by the purpose of usage. If you plan to take it with you while you travel then a smaller, light weight one may be a good choice. If games and vidoes are a high priority you may need to consider a bigger Tablet. Remember that generally speaking the smaller the tablet the less power it will have. However, the larger Tablets, although more powerful, generally will cost more.