In 2017 Bitcoin Blockchain size was 149 GB and February 2018 it was 157 GB according to Blockchain.info website Currently the size is increasing daily by number of transactions per day so I might think it is somewhere 200 GB above currently.
Maybe right now it has a data of approximately 250 GB. As the days go by, it will continue to increase especially when Bitcoin becomes more popular and mainstream. More and more people will make transactions that its size will even grow bigger.
If you will search it on google you'll find thag it is almost 250 GB but that is recordered on September 2019 so as of now January 2020 it is probably have passed the 250 GB mark and it will continue growing for a lot more people will embrace crypto specially bitcoin this year and that means more transactions will be made and its blockchain will grow even more faster than before.
Well, there has a 250gb size of storage of this bitcoin, as of now, the popularity of this coin are increased day by day by using it by many people in terms of payments and transactions, and also this maybe used in trading and any programs in terms of cryptocurrency.