The TPST336K006R0800: That ESR figure is the number to watch: it sets the ripple-current ceiling and the self-heating under load. For a 6.3 V rail, the 33 µF bulk cap provides enough charge reservoir for a moderate-load transient, but the 800 mOhm ESR means the ripple current should be kept below about 280 mA RMS at 85°C to stay within the 125°C max hot-spot temperature.
Case size and board-fit
The ±10% tolerance is standard for tantalum bulk decoupling. The surface-mount footprint matches the common 1210 land pattern, so no special pad geometry is needed.