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Yes, these books are small as some have mentioned in their reviews. That is exactly what I wanted. My 1yo grandson likes to have his own little books to look at and he can hold these easily in his little hands. The pictures are colorful and engaging. The reading is just right for young ones. Not too long - just enough for Mommy or Daddy to read the page before baby turns it. Each book is between 3" to 4" square and about 3/4" thick. (I didn't measure - just estimating sizes.)
My son was already pat the lessons in these book, so for us it was a waste of money. But, even when he was younger these would not have been very good. If you're just looking for pretty pictures to show your baby, then these are fine. If you are trying to teach your child how to actually count or say the alphabet, these are not great.