The Church has never taught a regularized form for the Eucharistic host. Traditionally it was actual flatbread in imitation of what was used at the last supper, and "broken" as Christ would have done. In many senses receiving a "broken" host is more authentic than receiving a whole one, but only symbolically.
The idea of the large host goes back to the Middle Ages where firstly it was just pragmatic to allow the mass attendees a chance to see the host at all from their seats. It grew in size because a sort of "cult" grew up at the time which believed that the "Elevation" of the Host was a magickal moment wherein one got directly in touch with Jesus and Grace flowed. Church "audiences" demanded that their priests hold the Host high and long for this parish, and it is even recorded that they would yell at a wavering priest: "Heave It higher father!!!". Church authorities finally decided that this was out of hand and forbad the excessive practice [doubtless much to the relief of priests' shoulders].
Large Hosts demand that they be broken before being consumed due to the limitations of most people's mouths, but whether the priest consumes the entire large "show" host or not is his choice somewhat depending upon ritual. In many parishes the priest will break the host into as many as 8 to 16 pieces, consume only one small one, and place the rest in the host chalice for general distribution. Why some decide to consume it all, who knows? The modern hosts are pre-divided usually to make easy breakage with minimal small flaking , so it does not seem to be a "practical decision."
GOD does not recognize any limitation of Space nor Time anyway, and so can decide to fully occupy any substance "fully" in the Eucharist, no matter how small the fragment nor what the substance [In some areas of the world, for instance, hosts are made of pressed yam "bread"]. Which pieces of "bread" are actually consecrated depend entirely on the intention of the Mass celebrant and not on location/distance. Small wayward fragments are properly looked after and "cleaned up" simply for symbolic reasons of respect and not because Christ somehow can't escape them and will be washed down the drain or trampled underfoot [although certain bonehead priests don't understand the proper theology of this]. In short, GOD's got it under control, despite human stupidity or occasional arrogance.
How does one frame a random question after that?? Lets get back to football: what would you rather have this recruiting season? A full set of 5 o-linemen, or a full set of four receivers??
